P.T. Nieuwkerk PhD publications

2021

• Klop Idserd D. G., van Putte Bart P., Kloppenburg Geoffrey T. L., Sprangers Mirjam A. G., Nieuwkerk Pythia T., Klein Patrick Comparing quality of life and postoperative pain after limited access and conventional aortic valve replacement: Design and rationale of the LImited access aortic valve replacement (LIAR) trial Contemporary Clinical Trials Communications 2021;21

2020

• Hu Ricardo V. P. F., Ramdas Sahienshadebie, Nieuwkerk Pythia, Reis Ria, Lai A Fat Rudy F. M., de Vries Henry J. C., Schallig Henk D. F. H. Body location of “new world” cutaneous leishmaniasis lesions and its impact on the quality of life of patients in suriname PLoS neglected tropical diseases 2020;14 (10):1-12 [PubMed]
• Willeit Peter, Tschiderer Lena, Allara Elias, Reuber Kathrin, Seekircher Lisa, Gao Lu, Liao Ximing, Lonn Eva, Gerstein Hertzel C., Yusuf Salim, Brouwers Frank P., Asselbergs Folkert W., van Gilst Wiek, Anderssen Sigmund A., Grobbee Diederick E., Kastelein John J. P., Visseren Frank L. J., Ntaios George, Hatzitolios Apostolos I., Savopoulos Christos, Nieuwkerk Pythia T., Stroes Erik, Walters Matthew, Higgins Peter, Dawson Jesse, Gresele Paolo, Guglielmini Giuseppe, Migliacci Rino, Ezhov Marat, Safarova Maya, Balakhonova Tatyana, Sato Eiichi, Amaha Mayuko, Nakamura Tsukasa, Kapellas Kostas, Jamieson Lisa M., Skilton Michael, Blumenthal James A., Hinderliter Alan, Sherwood Andrew, Smith Patrick J., van Agtmael Michiel A., Reiss Peter, van Vonderen Marit G. A., Kiechl Stefan, Klingenschmid Gerhard, Sitzer Matthias, Stehouwer Coen D. A., de Groot Eric, Grooteman Muriel P. C. Carotid Intima-Media Thickness Progression as Surrogate Marker for Cardiovascular Risk: Meta-Analysis of 119 Clinical Trials Involving 100 667 Patients Circulation 2020;142 (7):621-642 [PubMed]
• Poort H., Peters M. E. W. J., van der Graaf W. T. A., Nieuwkerk P. T., van de Wouw A. J., Nijhuis-van der Sanden M. W. G., Bleijenberg G., Verhagen C. A. H. H. V. M., Knoop H. Cognitive behavioral therapy or graded exercise therapy compared with usual care for severe fatigue in patients with advanced cancer during treatment: a randomized controlled trial Annals of oncology 2020;31 (1):115-122 [PubMed]
• Oreel Tom H., Delespaul Philippe, Hartog Iris D., Henriques José P. S., Netjes Justine E., Vonk Alexander B. A., Lemkes Jorrit, Scherer-Rath Michael, van Laarhoven Hanneke W. M., Sprangers Mirjam A. G., Nieuwkerk Pythia T. Ecological momentary assessment versus retrospective assessment for measuring change in health-related quality of life following cardiac intervention Journal of Patient-Reported Outcomes 2020;4 (1) [PubMed]
• Ngowi Kennedy N., Maro Eusebious, Aarnoutse Rob E., Mmbaga Blandina T., Sprangers Mirjam A. G., Reiss Peter, Nieuwkerk Pythia T., Sumari-de Boer I. Marion Feasibility of SMS to remind pregnant and breastfeeding women living with HIV to take antiretroviral treatment in Kilimanjaro region, Tanzania: a pilot study The East African Health Research Journal 2020;4 (2):140-148
• Oreel Tom H., Nieuwkerk Pythia T., Hartog Iris D., Netjes Justine E., Vonk Alexander B. A., Lemkes Jorrit, van Laarhoven Hanneke W. M., Scherer-Rath Michael, Sprangers Mirjam A. G., Henriques José P. S. Gender differences in quality of life in coronary artery disease patients with comorbidities undergoing coronary revascularization PLoS ONE 2020;15 (6):e0234543 [PubMed]
• van Munster K. N., van Mil J., Safer R., Nieuwkerk P. T., Ponsioen C. Y. Improving disease knowledge of primary sclerosing cholangitis patients and their relatives with a 3-dimensional education video Patient education and counseling 2020;103 (5):960-964 [PubMed]
• Hartog Iris, Scherer-Rath Michael, Kruizinga Renske, Netjes Justine, Henriques José, Nieuwkerk Pythia, Sprangers Mirjam, van Laarhoven Hanneke Narrative meaning making and integration: Toward a better understanding of the way falling ill influences quality of life Journal of health psychology 2020;25 (6):738-754 [PubMed]
• Laan Bart J., Nieuwkerk Pythia T., Geerlings Suzanne E. Patients knowledge and experience with urinary and peripheral intravenous catheters World journal of urology 2020;38 (1):57-62 [PubMed]
• Dickinson Laura, Gurjar Rohan, Stöhr Wolfgang, Bonora Stefano, Owen Andrew, D'Avolio Antonio, Cursley Adam, Molina Jean-Michel, Fäetkenheuer Gerd, Vandekerckhove Linos, di Perri Giovanni, Pozniak Anton, Richert Laura, Raffi François, Boffito Marta, Dedes Nikos, Chene Genevieve, Allavena Clotilde, Autran Brigitte, Antinori Andrea, Bucciardini Raffaella, Vella Stefano, Horban Andrzej, Arribas Jose, Babiker Abdel G., Pillay Deenan, Franquet Xavier, Schwarze Siegfried, Grarup Jesper, Fischer Aurelie, Wallet Cedrick, Diallo Alpha, Saillard Juliette, Moecklinghoff Christiane, Stellbrink Hans-Jurgen, Vanleeuwen Remko, Gatell Jose, Sandstrom Eric, Flepp Markus, Ewings Fiona, George Elizabeth C., Hudson Fleur, Pearce Gillian, Quercia Romina, Rogatto Felipe, Leavitt Randi, Prins Jan, Wit Ferdinand W. N. M., Reiss Peter, Nieuwkerk Pythia Population pharmacokinetics and pharmacogenetics of ritonavir-boosted darunavir in the presence of raltegravir or tenofovir disoproxil fumarate/emtricitabine in HIV-infected adults and the relationship with virological response: A sub-study of the NEAT001/ANRS143 randomized trial Journal of antimicrobial chemotherapy 2020;75 (3):628-639 [PubMed]
• Ngowi Kennedy Michael, Masika Lydia, Lyamuya Furaha, Muro Eva, Mmbaga Blandina T., Sprangers Mirjam A. G., Nieuwkerk Pythia T., Aarnoutse Rob E., Reiss Peter, Sumari-de Boer I. Marion Returning of antiretroviral medication dispensed over a period of 8 months suggests non-adherence despite full adherence according to real time medication monitoring AIDS research and therapy 2020;17 (1):57 [PubMed]
• Klop Idserd David G. rard, Kougioumtzoglou Athiná M., Kloppenburg Geoffrey T. L., van Putte Bart P., Sprangers Mirjam A. G., Klein Patrick, Nieuwkerk Pythia T. Short-term outcome of the intuity rapid deployment prosthesis: a systematic review and meta-analysis Interactive cardiovascular and thoracic surgery 2020;31 (4):427-436 [PubMed]
• Ngowi Kennedy Michael, Lyamuya Furaha, Mmbaga Blandina T., Muro Eva, Hillu Zawadiel, Shirima Mary, Aarnoutse Rob E., Sprangers Mirjam A. G., Nieuwkerk Pythia T., Reiss Peter, Boer Marion Sumaride Technical and psychosocial challenges of mhealth usage for antiretroviral therapy adherence among people living with HIV in a resource-limited setting: case series JMIR Formative Research 2020;4 (6) [PubMed]
• Tschiderer Lena, Seekircher Lisa, Klingenschmid Gerhard, Izzo Raffaele, Baldassarre Damiano, Iglseder Bernhard, Calabresi Laura, Liu Jing, Price Jackie F., Bae Jang-Ho, Brouwers Frank P., de Groot Eric, Schmidt Caroline, Bergström G. ran, Aşçi G. lay, Gresele Paolo, Okazaki Shuhei, Kapellas Kostas, Landecho Manuel F., Sattar Naveed, Agewall Stefan, Zou Zhi-Yong, Byrne Christopher D., Nanayakkara Prabath W. B., Papagianni Aikaterini, Witham Miles D., Bernal Enrique, Ekart Robert, van Agtmael Michiel A., Neves Mario F., Sato Eiichi, Ezhov Marat, Walters Matthew, Olsen Michael H., Stolić Radojica, Zozulińska-Ziółkiewicz Dorota A., Hanefeld Markolf, Staub Daniel, Nagai Michiaki, Nieuwkerk Pythia T., Huisman Menno V., Kato Akihiko, Honda Hirokazu, Parraga Grace, Magliano Dianna, Gabriel Rafael, Rundek Tatjana, Espeland Mark A., Kiechl Stefan, Willeit Johann The Prospective Studies of Atherosclerosis (Proof-ATHERO) Consortium: Design and Rationale Gerontology 2020;66 (5):447-459 [PubMed]
• Keulen J. K. J., Nieuwkerk P. T., Kortekaas J. C., van Dillen J., Mol B. W., van der Post J. A. M., de Miranda E. What women want and why. Women's preferences for induction of labour or expectant management in late-term pregnancy Women and birth 2020 [PubMed]

2019

• de Winter Janneke J., de Jong Henriëtte M., Nieuwkerk Pythia T., van der Horst-Bruinsma Irene E., Baeten Dominique L., van de Sande Marleen G. First-degree relatives of axial spondyloarthritis patients of the pre-SpA cohort would consider using medication in a preventive setting Clinical rheumatology 2019;38 (3):755-759 [PubMed]
• Rosmolen Wilda D., Phoa Nadine K. Y. N., Nieuwkerk Phytia T., Pouw Roos E., Weusten Bas L. A. M., Bisschops Raf, Schoon Erik J., Sprangers Mirjam A. G., Bergman Jacques J. G. H. M. Impact of ablation of Barrett's esophagus with low-grade dysplasia on patients’ illness perception and quality of life: a multicenter randomized trial Gastrointestinal endoscopy 2019;90 (2):215-221 [PubMed]
• Sumari-de Boer Marion, Pima Francis M., Ngowi Kennedy M., Chelangwa Geoffrey M., Mtesha Benson A., Minja Linda M., Semvua Hadija H., Mpagama Stella, Mmbaga Blandina T., Nieuwkerk Pythia T., Aarnoutse Rob E. Implementation and effectiveness of evriMED with short messages service (SMS) reminders and tailored feedback compared to standard care on adherence to treatment among tuberculosis patients in Kilimanjaro, Tanzania: Proposal for a cluster randomized controlled trial Trials 2019;20 (1) [PubMed]
• Hartog Iris D., Willems Dick L., van den Hout Wilbert B., Scherer-Rath Michael, Oreel Tom H., Henriques José P. S., Nieuwkerk Pythia T., van Laarhoven Hanneke W. M., Sprangers Mirjam A. G. Influence of response shift and disposition on patient-reported outcomes may lead to suboptimal medical decisions: a medical ethics perspective BMC medical ethics 2019;20 (1):61 [PubMed]
• Breukers Evi M. C., Raijmakers Ruud P. H., Nieuwkerk P. T., Bleijenberg Gijs, van der Meer Jos W. M., Bleeker-Rovers Chantal P., Keijmel Stephan P., Knoop Hans Mediation analysis shows that a decline in self-efficacy mediates the increase in fatigue severity following an initial positive response to cognitive behavioural therapy in Q fever fatigue syndrome Journal of psychosomatic research 2019;127 [PubMed]
• Beune Erik, Nieuwkerk Pythia, Stronks Karien, Meeks Karlijn, Schulze Matthias B., Mockenhaupt Frank P., Danquah Ina, Klipstein-Grobusch Kerstin, Agyei-Baffour Peter, Spranger Joachim, Addo Juliet, Smeeth Liam, Agyemang Charles Medication non-adherence and blood pressure control among hypertensive migrant and non-migrant populations of sub-Saharan African origin: the RODAM study Journal of human hypertension 2019;33 (2):131-148 [PubMed]
• Hartog Iris D., Scherer-Rath Michael, Oreel Tom H., Netjes Justine E., Henriques José P. S., Lemkes Jorrit, Vonk Alexander, Sprangers Mirjam A. G., Nieuwkerk Pythia T., van Laarhoven Hanneke W. M. Reconstructing Disruptive Life Events Using the RE-LIFE Questionnaire: Further Validation of the 'Narrative Meaning Making of Life Events' Model Using Multiple Mediation Analysis Journal of Empirical Theology 2019;32 (2):251-280
• Laan Ellen T. M., Prins Jan M., van Lunsen Rik H. W., Nieuwkerk Pythia T., Nievaard-Boon Marian A. F. Testosterone Insufficiency in Human Immunodeficiency Virus–Infected Women: A Cross-Sectional Study SEXUAL MEDICINE 2019;7 (1):72-79 [PubMed]
• Oreel Tom H., Borsboom Denny, Epskamp Sacha, Hartog Iris D., Netjes Justine E., Nieuwkerk Pythia T., Henriques José P. S., Scherer-Rath Michael, van Laarhoven Hanneke W. M., Sprangers Mirjam A. G. The dynamics in health-related quality of life of patients with stable coronary artery disease were revealed: a network analysis Journal of clinical epidemiology 2019;107:116-123 [PubMed]

2018

• Engelhard Esther A. N., Smit Colette, van Dijk Peter R., Kuijper T. Martijn, Wermeling Paulien R., Weel Angelique E., de Boer Michiel R., Brinkman Kees, Geerlings Suzanne E., Nieuwkerk Pythia T. Health-related quality of life of people with HIV: an assessment of patient related factors and comparison with other chronic diseases AIDS (London, England) 2018;32 (1):103-112 [PubMed]
• George Elizabeth C., Bucciardini Raffaella, Richert Laura, Dedes Nikos, Fragola Vincenzo, Nieuwkerk Pythia, Spire Bruno, Volny-Anne Alain, West Brian, Molina Jean-Michel, Horban Andrzej, Fox Julie, Pozniak Anton, Vella Stefano, Termote Monique, Raffi François Patient-Reported Outcomes in First-Line Antiretroviral Therapy: Results From NEAT001/ANRS143 Trial Comparing Darunavir/Ritonavir in Combination With Tenofovir/Emtricitabine or Raltegravir JOURNAL OF ACQUIRED IMMUNE DEFICIENCY SYNDROMES 2018;79 (4):519-526 [PubMed]
• Horbach S. E. R., van de Ven J. S., Nieuwkerk P. T., Spuls Ph. I., van der Horst C. M. A. M., Reekers J. A. Patient-Reported Outcomes of Bleomycin Sclerotherapy for Low-Flow Vascular Malformations and Predictors of Improvement Cardiovascular and interventional radiology 2018;41 (10):1494-1504 [PubMed]
• De Francesco Davide, Verboeket Sebastiaan O, Underwood Jonathan, Bagkeris Emmanouil , Wit Ferdinand W, Mallon Patrick W G, Winston Alan, Reiss Peter, Sabin Caroline A, Study group members AMC , Reiss P. , Wit F. W. N. M., Kooij K. W., van Zoest R. A. , Verheij E. , Verboeket Sebastiaan O., Prins M. , Kootstra N. A., Harskamp-Holwerda A. M. , Maurer Irma, Mangas Ruiz M. M., Boeser-Nunnink B. D. M. , Geerlings S. E. , Goorhuis A. , Hovius J. W. R. , Nellen F. J. B. , van der Poll Tom, Prins J. M. , Wiersinga W. J. , van Vugt M. , de Bree G. J. , Postema P. G. , Bisschop P. H. L. T., Serlie M. J. M. , Dekker E. , van der Velde N. , Willemsen J. M. R., Vogt L. , Portegies P. , Schmand B. A. , Geurtsen G. J. , Verbraak F. D. , Visser I. , Nieuwkerk P. T. , Majoie C. B. L. M. , Caan M. W. A. , van Lunsen H. W. , van den Born B. J. H. , Stroes E. S. G. Patterns of co-occurring comorbidities in people living with HIV Open forum infectious diseases 2018;5 (11):ofy272 [PubMed]

2017

• Engelhard Esther A. N., Smit Colette, Kroon Frank P., Nieuwkerk Pythia T., Reiss Peter, Brinkman Kees, Geerlings Suzanne E. A Survey of Patients' Perspectives on Outpatient HIV Care in the Netherlands Infectious diseases and therapy 2017;6 (3):443-452 [PubMed]
• Langebeek Nienke, Kooij Katherine W., Wit Ferdinand W., Stolte Ineke G., Sprangers Mirjam A. G., Reiss Peter, Nieuwkerk Pythia T. Impact of comorbidity and ageing on health-related quality of life in HIV-positive and HIV-negative individuals AIDS (London, England) 2017;31 (10):1471-1481 [PubMed]
• Jellema Hinke Marijke, Saeed Peerooz, Mombaerts Ilse, Dolman Peter J., Garrity Jim, Kazim Mike, Dhrami-Gavazi Elona, Lyons Christopher, Nieuwkerk Pythia, Mourits Maarten P. Objective and subjective outcomes of strabismus surgery in Graves' orbitopathy: a prospective multicentre study Acta ophthalmologica 2017;95 (4):386-391 [PubMed]
• Brekelmans M. P. A., Kappelhof M., Nieuwkerk P. T., Nierman M., Buller H. R., Coppens M. Preference for direct oral anticoagulants in patients treated with vitamin K antagonists for venous thromboembolism Netherlands journal of medicine 2017;75 (2):50-55 [PubMed]
• Rosmolen Wilda D., Nieuwkerk Pythia T., Pouw Roos E., van Berge Henegouwen Mark I., Bergman Jacques J. G. H. M., Sprangers Mirjam A. G. Quality of life and fear of cancer recurrence after endoscopic treatment for early Barrett's neoplasia: a prospective study Diseases of the esophagus 2017;30 (3):1-9 [PubMed]
• Been Sabrina K., Yildiz Elif, Nieuwkerk Pythia T., Pogány Katalin, van de Vijver David A. M. C., Verbon Annelies Self-reported adherence and pharmacy refill adherence are both predictive for an undetectable viral load among HIV-infected migrants receiving cART PLoS ONE 2017;12 (11):e0186912 [PubMed]
• Mekuria Legese A., Prins Jan M., Yalew Alemayehu W., Sprangers Mirjam A. G., Nieuwkerk Pythia T. Sub-optimal adherence to combination anti-retroviral therapy and its associated factors according to self-report, clinician-recorded and pharmacy-refill assessment methods among HIV-infected adults in Addis Ababa AIDS care 2017;29 (4):428-435 [PubMed]
• Langebeek Nienke Treatment adherence, health related quality of life and aging in HIV-1 infected patients 2017. 189p. ISBN 9789090303222. [UvA Dissertations Online] University of Amsterdam. (Supervisors: Sprangers M. A. G. , Reiss P.; Co-supervisor: Nieuwkerk P. T.)

2016

• Lambert-Niclot S., George E. C., Pozniak A., White E., Schwimmer C., Jessen H., Johnson M., Dunn D., Perno C. F., Clotet B., Plettenberg A., Blaxhult A., Palmisano L., Wittkop L., Calvez V., Marcelin A. G., Raffi F., Dedes Nikos, Chêne Geneviève, Richert Laura, Allavena Clotilde, Raffi François, Autran Brigitte, Antinori Andrea, Bucciardini Raff Aella, Vella Stefano, Horban Andrzej, Arribas Jose, Babiker Abdel G., Boffito Marta, Pillay Deenan, Pozniak Anton, Franquet Xavier, Schwarze Siegfried, Grarup Jesper, Fischer Aurélie, Wallet Cédrick, Diallo Alpha, Molina Jean-Michel, Saillard Juliette, Moecklinghoff Christiane, Stellbrink Hans-Jürgen, van Leeuwen Remko, Gatell Jose, Sandstrom Eric, Flepp Markus, Prins Jan, Wit Ferdinand W. N. M., Reiss Peter, Nieuwkerk Pythia Antiretroviral resistance at virological failure in the NEAT 001/ANRS 143 trial: raltegravir plus darunavir/ritonavir or tenofovir/emtricitabine plus darunavir/ritonavir as first-line ART Journal of antimicrobial chemotherapy 2016;71 (4):1056-1062 [PubMed]
• Kooij Katherine W., Wit Ferdinand W. N. M., Booiman Thijs, van der Valk Marc, Schim van der Loeff Maarten F., Kootstra Neeltje A., Reiss Peter, Schouten J., van Zoest R. A., Verheij E., Elsenga B. C., Prins M., Martens M., Moll S., Berkel J., Totté M., Visser G. R., May L., Kovalev S., Newsum A., Boeser-Nunnink B., Geerlings S. E., Godfried M. H., Goorhuis A., Hovius J. W. R., van der Meer J. T. M., Nellen F. J. B., van der Poll T., Prins J. M., Wiersinga W. J., van Vugt M., Postema P. G., Bisschop P. H. L. T., Serlie M. J. M., Dekker E., van der Velde N., Vogt L., Portegies P., Schmand B. A., Geurtsen G. J., Verbraak F. D., Demirkaya N., Nieuwkerk P. T., Langebeek N., van Steenwijk R. P., Majoie C. B. L. M., Caan M. W. A., van Lunsen H. W., van den Born B. J. H., Stroes E. S. G. Cigarette Smoking and Inflammation, Monocyte Activation, and Coagulation in HIV-Infected Individuals Receiving Antiretroviral Therapy, Compared With Uninfected Individuals Journal of infectious diseases 2016;214 (12):1817-1821 [PubMed]
• Langebeek Nienke, Nieuwkerk Pythia Corrigendum: Electronic medication monitoring-informed counseling to improve adherence to combination anti-retroviral therapy and virologic treatment outcomes: a meta-analysis Frontiers in public health 2016;4:90 [PubMed]
• Schouten Judith, Su Tanja, Wit Ferdinand W., Kootstra Neeltje A., Caan Matthan W. A., Geurtsen Gert J., Schmand Ben A., Stolte Ineke G., Prins Maria, Majoie Charles B., Portegies Peter, Reiss Peter, van der Valk M., Kooij K. W., van Zoest R. A., Elsenga B. C., Prins M., Stolte I. G., Martens M., Moll S., Berkel J., Möller L., Visser G. R., Gras L. A. J., van Leeuwen E., Geerlings S. E., Godfried M. H., Goorhuis A., van der Meer J. T. M., Nellen F. J. B., van der Poll T., Prins J. M., Wiersinga W. J., Postema P. G., Bisschop P. H. L. T., Serlie M. J. M., Dekker E., de Rooij S. E. J. A., Vogt L., van Eck-Smit B. L. F., de Jong M., Richel D. J., Verbraak F. D., Demirkaya N., Ruhé H. G., Nieuwkerk P. T., van Steenwijk R. P., van Lunsen H. W., van den Born B. J. H., Stroes E. S. G. Determinants of reduced cognitive performance in HIV-1-infected middle-aged men on combination antiretroviral therapy AIDS (London, England) 2016;30 (7):1027-1038 [PubMed]
• de Sumari-de Boer I. Marion, van den Boogaard Jossy, Ngowi Kennedy M., Semvua Hadija H., Kiwango Krisanta W., Aarnoutse Rob E., Nieuwkerk Pythia T., Kibiki Gibson S. Feasibility of Real Time Medication Monitoring Among HIV Infected and TB Patients in a Resource-Limited Setting AIDS and behavior 2016;20 (5):1097-1107 [PubMed]
• Siegenbeek van Heukelom Matthijs L., Richel Olivier, Nieuwkerk Pythia T., de Vries Henry J. C., Prins Jan M. Health-Related Quality of Life and Sexual Functioning of HIV-Positive Men Who Have Sex With Men Who Are Treated for Anal Intraepithelial Neoplasia Diseases of the colon and rectum 2016;59 (1):42-47 [PubMed]
• Mekuria Legese A., Nieuwkerk Pythia T., Yalew Alemayehu W., Sprangers Mirjam Ag, Prins Jan M. High level of virological suppression among HIV-infected adults receiving combination antiretroviral therapy in Addis Ababa, Ethiopia Antiviral therapy 2016;21 (5):385-396 [PubMed]
• Demirkaya Nazli, Wit Ferdinand W. N. M., van den Berg Thomas J. T. P., Kooij Katherine W., Prins Maria, Schlingemann Reinier O., Abramoff Michael D., Reiss Peter, Verbraak Frank D., van der Valk M., Schouten J. [=Judith], van Zoest R. A., Elsenga B. C., Martens M., Moll S., Berkel J., Totté M., Visser G. R., Kovalev S., Kootstra N. A., van Leeuwen E., Geerlings S. E., Godfried M. H., Goorhuis A., Hovius J. W. R., van der Meer J. T. M., Nellen F. J. B., van der Poll T., Prins J. M., Wiersinga W. J., Postema P. G., Bisschop P. H. L. T., Serlie M. J. M., Dekker E., de Rooij S. E. J. A., Vogt L., Portegies P., Schmand B. A., Geurtsen G. J., van Eck-Smit B. L. F., de Jong M., Richel D. J., Ruhé H. G., Nieuwkerk P. T., van Steenwijk R. P., Majoie C. B. L. M., Caan M. W. A., van Lunsen H. W., van den Born B. J. H., Stroes E. S. G. HIV-Associated Neuroretinal Disorder in Patients With Well-Suppressed HIV-Infection: A Comparative Cohort Study Investigative ophthalmology & visual science 2016;57 (3):1388-1397 [PubMed]
• Winston A., Stöhr W., Antinori A., Arenas-Pinto A., Llibre J. M., Amieva H., Cabié A., Williams I., Di Perri G., Tellez M. J., Rockstroh J., Babiker A., Pozniak A., Raffi F., Richert L., Dedes Nikos, Chene Genevieve, Allavena Clotilde, Autran Brigitte, Bucciardini Raffaella, Vella Stefano, Horban Andrzej, Arribas Jose, Boffito Marta, Pillay Deenan, Franquet Xavier, Schwarze Siegfried, Grarup Jesper, Fischer Aurelie, Wallet Cedrick, Diallo Alpha, Molina Jean-Michel, Saillard Juliette, Moecklinghoff Christiane, Stellbrink Hans-Jurgen, Leeuwen Remko, Gatell Jose, Sandstrom Eric, Flepp Markus, Ewings Fiona, George Elizabeth C., Hudson Fleur, Pearce Gillian, Quercia Romina, Rogatto Felipe, Leavitt Randi, Prins Jan, Wit Ferdinand W. N. M., Reiss Peter, Nieuwkerk Pythia Host and disease factors are associated with cognitive function in European HIV-infected adults prior to initiation of antiretroviral therapy HIV medicine 2016;17 (6):471-478 [PubMed]
• Engelhard Esther A. N., Smit Colette, van Sighem Ard, Reiss Peter, Nieuwkerk Pythia T., Kroon Frank P., Brinkman Kees, Geerlings Suzanne E. Impact of HIV care facility characteristics on the cascade of care in HIV-infected patients in the Netherlands AIDS (London, England) 2016;30 (2):301-310 [PubMed]
• Engelhard Esther A. N., Smit Colette, Vervoort Sigrid C. J. M., Smit Peter J., Nieuwkerk Pythia T., Kroon Frank P., Reiss Peter, Brinkman Kees, Geerlings Suzanne E. Patients' Willingness to Take Multiple-Tablet Antiretroviral Therapy Regimens for Treatment of HIV Drugs - real world outcomes 2016;3 (2):223-230 [PubMed]
• Mekuria Legese A. Retention in care, viral suppression, treatment adherence and quality of life in a public antiretroviral therapy program in Addis Ababa, Ethiopia 2016. 172p. [UvA Dissertations Online] University of Amsterdam. (Supervisors: Sprangers M. A. G., Prins J. M.; Co-supervisors: Yalew A. W., Nieuwkerk P. T.)
• Been Sabrina K., van de Vijver David A. M. C., Nieuwkerk Pythia T., Brito Inês, Stutterheim Sarah E., Bos Arjan E. R., Wolfers Mireille E. G., Pogány Katalin, Verbon Annelies Risk Factors for Non-Adherence to cART in Immigrants with HIV Living in the Netherlands: Results from the ROtterdam ADherence (ROAD) Project PLoS ONE 2016;11 (10):e0162800 [PubMed]
• Engelhard Esther A. N., Smit Colette, Nieuwkerk Pythia T., Reiss Peter, Kroon Frank P., Brinkman Kees, Geerlings Suzanne E. Structure and quality of outpatient care for people living with an HIV infection AIDS care 2016;28 (8):1062-1072 [PubMed]
• Cobos Jiménez Viviana, Wit Ferdinand W. N. M., Joerink Maaike, Maurer Irma, Harskamp Agnes M., Schouten Judith, Prins Maria, van Leeuwen Ester M. M., Booiman Thijs, Deeks Steven G., Reiss Peter, Kootstra Neeltje A., van der Valk M., Kooij K. W., van Zoest R. A., Elsenga B. C., Prins M., Martens M., Boeser-Nunnink B., Geerlings S. E., Godfried M. H., Goorhuis A., Hovius J. W. R., Nellen F. J. B., van der Meer J. T. M., van der Poll T., Prins J. M., Wiersinga W. J., Postema P. G., Bisschop P. H. L. T., Serlie M. J. M., Dekker E., de Rooij S. E. J. A., Vogt L., Portegies P., Schmand B. A., Geurtsen G. J., van Eck-Smit B. L. F., de Jong M., Richel D. J., Verbraak F. D., Demirkaya N., Ruhé H. G., Nieuwkerk P. T., van Steenwijk R. P., Majoie C. B. L. M., Caan M. W. A., van Lunsen H. W., van den Born B. J. H., Stroes E. S. G. T-Cell Activation Independently Associates With Immune Senescence in HIV-Infected Recipients of Long-term Antiretroviral Treatment Journal of infectious diseases 2016;214 (2):216-225 [PubMed]
• Mekuria Legese A., Prins Jan M., Yalew Alemayehu W., Sprangers Mirjam A. G., Nieuwkerk Pythia T. Which adherence measure - self-report, clinician recorded or pharmacy refill - is best able to predict detectable viral load in a public ART programme without routine plasma viral load monitoring? Tropical medicine & international health 2016;21 (7):856-869 [PubMed]

2015

• Bernardino Jose I., Mocroft Amanda, Mallon Patrick W., Wallet Cedrick, Gerstoft Jan, Russell Charlotte, Reiss Peter, Katlama Christine, de Wit Stephane, Richert Laura, Babiker Abdel, Buño Antonio, Castagna Antonella, Girard Pierre-Marie, Chene Genevieve, Raffi Francois, Arribas Jose R., Dedes Nikos, Allavena Clotilde, Autran Brigitte, Antinori Andrea, Bucciardini Raffaella, Vella Stefano, Horban Andrzej, Arribas Jose, Babiker Abdel G., Boffito Marta, Pillay Deenan, Pozniak Anton, Franquet Xavier, Schwarze Siegfried, Grarup Jesper, Fischer Aurelie, Diallo Alpha, Molina Jean-Michel, Saillard Juliette, Moecklinghoff Christiane, Stellbrink Hans-Jurgen, van Leeuwen Remko, Gatell Jose, Sandstrom Eric, Flepp Markus, Ewings Fiona, George Elizabeth C., Hudson Fleur, Pearce Gillian, Quercia Romina, Prins Jan, Wit Ferdinand W. N. M., Nieuwkerk Pythia Bone mineral density and inflammatory and bone biomarkers after darunavir-ritonavir combined with either raltegravir or tenofovir-emtricitabine in antiretroviral-naive adults with HIV-1: a substudy of the NEAT001/ANRS143 randomised trial Lancet HIV 2015;2 (11):e464-e473 [PubMed]
• Lokin Joost L. C., Hengeveld Paul J., Conijn Anne P., Nieuwkerk Pythia T., Koelemay Mark J. W. Disease understanding in patients with intermittent claudication: A qualitative study Journal of vascular nursing 2015;33 (3):112-118 [PubMed]
• Langebeek Nienke, Nieuwkerk Pythia Electronic medication monitoring-informed counseling to improve adherence to combination anti-retroviral therapy and virologic treatment outcomes: a meta-analysis Frontiers in public health 2015;3:139 [PubMed]
• Mekuria Legese A., Sprangers Mirjam A. G., Prins Jan M., Yalew Alemayehu W., Nieuwkerk Pythia T. Health-related quality of life of HIV-infected adults receiving combination antiretroviral therapy in Addis Ababa AIDS care 2015;27 (8):934-945 [PubMed]
• van Middelaar Tessa, Richard Edo, van der Worp H. Bart, van den Munckhof Pepijn, Nieuwkerk Pythia T., Visser Marieke C., Stam Jan, Nederkoorn Paul J. Quality of life after surgical decompression for a space-occupying middle cerebral artery infarct: A cohort study BMC neurology 2015;15 (1):156 [PubMed]
• Verkerk Agnes J., Vermeer Alexa M., Smets Ellen M., Dekker Lukas R., Wilde Arthur A., van Langen Irene M., Christiaans Imke, Nieuwkerk Pythia T. Quality of Life in Young Adult Patients with a Cardiogenetic Condition Receiving an ICD for Primary Prevention of Sudden Cardiac Death Pacing and clinical electrophysiology 2015;38 (7):870-877 [PubMed]
• Mekuria Legese A., Prins Jan M., Yalew Alemayehu W., Sprangers Mirjam A. G., Nieuwkerk Pythia T. Retention in HIV Care and Predictors of Attrition from Care among HIV-Infected Adults Receiving Combination Anti-Retroviral Therapy in Addis Ababa PLoS ONE 2015;10 (6):e0130649 [PubMed]
• Boom M. S., Berghuis E. M., Nieuwkerk P. T., Pinedo S., Büller H. R. When do patients prefer a direct oral anticoagulant over a vitamin K antagonist? Netherlands journal of medicine 2015;73 (8):368-372 [PubMed]

2014

• Langebeek N., Sprenger H. G., Gisolf E. H., Reiss P., Sprangers M. A. G., Legrand Jc, Richter C., Nieuwkerk P. T. A simplified combination antiretroviral therapy regimen enhances adherence, treatment satisfaction and quality of life: results of a randomized clinical trial HIV medicine 2014;15 (5):286-290 [PubMed]
• Schouten Judith, Wit Ferdinand W., Stolte Ineke G., Kootstra Neeltje A., van der Valk Marc, Geerlings Suzanne E., Prins Maria, Reiss Peter, Kooij K. W., van Zoest R. A., Elsenga B. C., Stolte I. G., Martens M., Moll S., Berkel J., Möller L., Visser G. R., Welling C., Zaheri S., Gras L. A. J., van Leeuwen E., Godfried M. H., Goorhuis A., van der Meer J. T. M., Nellen F. J. B., van der Poll T., Prins J. M., Wiersinga W. J., Postema P. G., Bisschop P. H. L. T., Serlie M. J. M., Dekker E., de Rooij S. E. J. A., Vogt L., Portegies P., Schmand B. A., Geurtsen G. J., van Eck-Smit B. L. F., de Jong M., Richel D. J., Verbraak F. D., Demirkaya N., Ruhé H. G., Nieuwkerk P. T., van Steenwijk R. P., Majoie C. B. L. M., Caan M. W. A., van Lunsen H. W., van den Born B. J. H., Stroes E. S. G. Cross-sectional comparison of the prevalence of age-associated comorbidities and their risk factors between HIV-infected and uninfected individuals: the AGEhIV cohort study Clinical infectious diseases 2014;59 (12):1787-1797 [PubMed]
• Vriend Henrike J., Nieuwkerk Pythia T., van der Sande Marianne A. B. Impact of genital warts on emotional and sexual well-being differs by gender International journal of STD & AIDS 2014;25 (13):949-955 [PubMed]
• Langebeek Nienke, Gisolf Elizabeth H., Reiss Peter, Vervoort Sigrid C., Hafsteinsdóttir Thóra B., Richter Clemens, Sprangers Mirjam A. G., Nieuwkerk Pythia T. Predictors and correlates of adherence to combination antiretroviral therapy (ART) for chronic HIV infection: a meta-analysis BMC medicine 2014;12 (1):142 [PubMed]
• Raffi François, Babiker Abdel G., Richert Laura, Molina Jean-Michel, George Elizabeth C., Antinori Andrea, Arribas Jose R., Grarup Jesper, Hudson Fleur, Schwimmer Christine, Saillard Juliette, Wallet Cédrick, Jansson Per O., Allavena Clotilde, van Leeuwen Remko, Delfraissy Jean-François, Vella Stefano, Chêne Geneviève, Pozniak Anton, Dedes Nikos, Autran Brigitte, Bucciardini Raffaella, Horban Andrzej, Arribas José, Boffito Marta, Pillay Deenan, Franquet Xavier, Schwarze Siegfried, Fischer Aurélie, Diallo Alpha, Moecklinghoff Christiane, Stellbrink Hans-Jürgen, Gatell José, Sandström Eric, Flepp Markus, Ewings Fiona, Pearce Gillian, Quercia Romina, Rogatto Felipe, Leavitt Randi, Nguyen Bach-Yen, Goebel Frank, Marcotullio Simone, Kaur Navrup, Sasieni Peter, Spencer-Drake Christina, Prins Jan, Wit Ferdinand W. N. M., Reiss Peter, Nieuwkerk Pythia Ritonavir-boosted darunavir combined with raltegravir or tenofovir-emtricitabine in antiretroviral-naive adults infected with HIV-1: 96 week results from the NEAT001/ANRS143 randomised non-inferiority trial Lancet 2014;384 (9958):1942-1951 [PubMed]
• van Rozelaar Leo, Kadouch Jonathan A., Duyndam Debbie A., Nieuwkerk Pythia T., Lutgendorff Femke, Karim Refaat B. Semipermanent Filler Treatment of HIV-Positive Patients With Facial Lipoatrophy: Long-Term Follow-up Evaluating MR Imaging and Quality of Life Aesthetic surgery journal / the American Society for Aesthetic Plastic surgery 2014;34 (1):118-132 [PubMed]
• Frans F. A., Nieuwkerk P. T., Met R., Bipat S., Legemate D. A., Reekers J. A., Koelemay M. J. W. Statistical or clinical improvement? Determining the minimally important difference for the vascular quality of life questionnaire in patients with critical limb ischemia European journal of vascular and endovascular surgery 2014;47 (2):180-186 [PubMed]
• van Galen Katy A., Nellen Jeannine F., Nieuwkerk Pythia T. The Effect on Treatment Adherence of Administering Drugs as Fixed-Dose Combinations versus as Separate Pills: Systematic Review and Meta-Analysis AIDS research and treatment 2014;2014:967073 [PubMed]

2013

• Bennebroek Evertsz' F., Hoeks Céline C. M. Q., Nieuwkerk Pythia T., Stokkers Pieter C. F., Ponsioen Cyriel Y., Bockting Claudi L. H., Sanderman Robbert, Sprangers Mirjam A. G. Development of the patient Harvey Bradshaw index and a comparison with a clinician-based Harvey Bradshaw index assessment of Crohn's disease activity Journal of clinical gastroenterology 2013;47 (10):850-856 [PubMed]
• Bennebroek Evertsz' Floor, Nieuwkerk Pythia T., Stokkers Pieter C. F., Ponsioen Cyriel Y., Bockting Claudi L. H., Sanderman Robbert, Sprangers Mirjam A. G. Reply to Drs. Walmsley and Casey letter Journal of Crohn s & colitis 2013;7 (11):932 [PubMed]
• Musters A. M., Koot Y. E. M., van den Boogaard N. M., Kaaijk E., Macklon N. S., van der Veen F., Nieuwkerk P. T., Goddijn M. Supportive care for women with recurrent miscarriage: a survey to quantify women's preferences Human reproduction (Oxford, England) 2013;28 (2):398-405 [PubMed]
• Bennebroek Evertsz' Floor, Nieuwkerk Pythia T., Stokkers Pieter C. F., Ponsioen Cyriel Y., Bockting Claudi L. H., Sanderman Robbert, Sprangers Mirjam A. G. The patient simple clinical colitis activity index (P-SCCAI) can detect ulcerative colitis (UC) disease activity in remission: a comparison of the P-SCCAI with clinician-based SCCAI and biological markers Journal of Crohn s & colitis 2013;7 (11):890-900 [PubMed]

2012

• Bennebroek Evertsz' F., Thijssens N. A. M., Stokkers P. C. F., Grootenhuis M. A., Bockting C. L. H., Nieuwkerk P. T., Sprangers M. A. G. Do Inflammatory Bowel Disease patients with anxiety and depressive symptoms receive the care they need? Journal of Crohn s & colitis 2012;6 (1):68-76 [PubMed]
• Sumari-de Boer I. Marion, Sprangers Mirjam A. G., Prins Jan M., Nieuwkerk Pythia T. HIV Stigma and Depressive Symptoms are Related to Adherence and Virological Response to Antiretroviral Treatment Among Immigrant and Indigenous HIV Infected Patients AIDS and behavior 2012;16 (6):1681-1689 [PubMed]
• Nieuwkerk Pythia T., Nierman Melchior C., Vissers Maud N., Locadia Mirjam, Greggers-Peusch Phillip, Knape Léon P. M., Kastelein John J. P., Sprangers Mirjam A. G., de Haes Hanneke C., Stroes Erik S. G. Intervention to Improve Adherence to Lipid-Lowering Medication and Lipid-Levels in Patients With an Increased Cardiovascular Risk American journal of cardiology 2012;110 (5):666-672 [PubMed]
• Blom R. L. G. M., Nieuwkerk P. T., van Heijl M., Bindels P., Klinkenbijl J. H. G., Sprangers M. A. G., van Berge Henegouwen M. I. Patient Preferences in Screening for Recurrent Disease after Potentially Curative Esophagectomy Digestive surgery 2012;29 (3):206-212 [PubMed]
• Sumari-de Boer I. Marion, Nellen F. J. B., Sprangers M. A. G., Prins J. M., Nieuwkerk P. T. Personalized stigma and disclosure concerns among HIV-infected immigrant and indigenous HIV-infected persons in the Netherlands. Journal of HIV/AIDS & Social Services 2012;11 (1):42-56
• Grijsen M. L., Koster G. T., van Vonderen M. G. A., van Kasteren M., Kootstra G. J., Steingrover R., de Wolf F., Prins J. M., Nieuwkerk P. T., Lange J. M. A., Vermeulen J. N., Nievaard M., Slegtenhorst B., Doevelaar H., Koevoets W., Nobel H. E., Hendericks A., Pijnappel F. J. J., van der Ende M. E., Rijnders B. J. A., Padmos I., van Zonneveld L., Been S., Kauffmann R. H., Schippers E. F., Korte R., van Ijperen J. M., Kate R. W., Soetekouw R., Hulshoff N., Schoemaker-Ransijn M., Kroon F. P., Dorama W., Moons C. A. M., Verbon A., Lowe S. H., Schreij G., van der Geest S., Oude Lashof A. M., Schippers J., Bronsveld W., van Twillert G., van Houte D., Faber S., Rotteveel S., ten Napel C. H. H., Heins H., Brinkman K., van den Berk G. E. L., Blok W. L. Temporary antiretroviral treatment during primary HIV-1 infection has a positive impact on health-related quality of life: data from the Primo-SHM cohort study HIV medicine 2012;13 (10):630-635 [PubMed]

2011

• de Boer I. Marion Combination antiretroviral therapy among immigrant and indigenous HIV infected patients: quality of life and treatment adherences.l.,: 2011. 137p. ISBN 9789490371708. [UvA Dissertations Online] University of Amsterdam. (Supervisors: Sprangers M. A. G., Prins J. M.; Co-supervisor: Nieuwkerk P. T.)
• Ferns Sandra P., Nieuwkerk Pythia T., van Rooij Willem Jan J., Rinkel Gabriël J. E., Majoie Charles B. L. M. Long-term MRA follow-up after coiling of intracranial aneurysms: impact on mood and anxiety Neuroradiology 2011;53 (5):343-348 [PubMed]
• Hakvoort R. A., Nieuwkerk P. T., Burger M. P., Emanuel M. H., Roovers J. P. Patient preferences for clean intermittent catheterisation and transurethral indwelling catheterisation for treatment of abnormal post-void residual bladder volume after vaginal prolapse surgery BJOG 2011;118 (11):1324-1328 [PubMed]
• de Boer I. Marion, Prins Jan M., Sprangers Mirjam A. G., Smit Colette, Nieuwkerk Pythia T. Self-Reported Symptoms Among HIV-lnfected Patients on Highly Active Antiretroviral Therapy in the ATHENA Cohort in The Netherlands ≯ HIV clinical trials 2011;12 (3):161-170 [PubMed]

2010

• de Boer-van der Kolk I. Marion, Sprangers Mirjam A. G., Prins Jan M., Smit Colette, de Wolf Frank, Nieuwkerk Pythia T. Health-related quality of life and survival among HIV-infected patients receiving highly active antiretroviral therapy: a study of patients in the AIDS Therapy Evaluation in the Netherlands (ATHENA) Cohort Clinical infectious diseases 2010;50 (2):255-263 [PubMed]
• Nieuwkerk Pythia T., de Boer-van der Kolk I. Marion, Prins Jan M., Locadia Mirjam, Sprangers Mirjam A. G. Self-reported adherence is more predictive of virological treatment response among patients with a lower tendency towards socially desirable responding Antiviral therapy 2010;15 (6):913-916 [PubMed]
• Smets E. M. A., Nieuwkerk P. T. Therapietrouwin: A. A. Kaptein, J. B. Prins, E. H. Collette, R. L. Hulsman, editors. Medische psychologie. Houten: Bohn Stafleu Van Loghum; 2010. p. 132-139, ISBN 9789031378197
• de Boer I. Marion, Prins Jan M., Sprangers Mirjam A. G., Nieuwkerk Pythia T. Using different calculations of pharmacy refill adherence to predict virological failure among HIV-infected patients JOURNAL OF ACQUIRED IMMUNE DEFICIENCY SYNDROMES 2010;55 (5):635-640 [PubMed]

2009

• Nieuwkerk Pythia T., Sprangers Mirjam A. G. Each Measure of Patient-Reported Change Provides Useful Information and Is Susceptible to Bias: The Need to Combine Methods to Assess Their Relative Validity Arthritis and rheumatism 2009;61 (12):1623-1625 [PubMed]
• Duffels Mariëlle G. J., Vis Jeroen C., van Loon Rosa L. E., Nieuwkerk Pythia T., van Dijk Arie P. J., Hoendermis Elke S., de Bruin-Bon Rianne H. A. C. M., Bouma Berto J., Bresser Paul, Berger Rolf M. F., Mulder Barbara J. M. Effect of Bosentan on Exercise Capacity and Quality of Life in Adults With Pulmonary Arterial Hypertension Associated With Congenital Heart Disease With and Without Down's Syndrome American journal of cardiology 2009;103 (9):1309-1315 [PubMed]
• Nellen Jeannine F. J. B., Nieuwkerk Pythia T., Burger David M., Wibaut Mirte, Gras Luuk A., Prins Jan M. Which method of adherence measurement is most suitable for daily use to predict virological failure among immigrant and non-immigrant HIV-1 infected patients? AIDS care 2009;21 (7):842-850 [PubMed]

2008

• Buchholz Angela, Krol Anneke, Rist Fred, Nieuwkerk Pythia T., Schippers Gerard M. An assessment of factorial structure and health-related quality of life in problem drug users using the Short Form 36 Health Survey Quality of life research 2008;17 (7):1021-1029 [PubMed]
• van Leeuwen Elisabeth, Visser Marja, Prins Jan M., Nieuwkerk Pythia T., van der Veen Fulco HIV couples' anxiety and risk taking during ART Fertility and sterility 2008;90 (2):456-458 [PubMed]
• Karim Refaat B., de Lint Cathelijne A., van Galen Sebastiaan R., van Rozelaar Leo, Nieuwkerk Pythia T., Askarizadeh Erfan, Hage J. Joris Long-Term Effect of Polyalkylimide Gel Injections on Severity of Facial Lipoatrophy and Quality of Life of HIV-Positive Patients Aesthetic plastic surgery 2008;32 (6):873-878 [PubMed]
• de Boer-van der Kolk I. Marion, Sprangers Mirjam A. G., Ende Marchina van der, Schreij Gerrit, Wolf Frank de, Nieuwkerk Pythia T. Lower Perceived Necessity of HAART Predicts Lower Treatment Adherence and Worse Virological Response in the ATHENA Cohort JOURNAL OF ACQUIRED IMMUNE DEFICIENCY SYNDROMES 2008;49 (4):460-462 [PubMed]
• Winter Michiel M., Bouma Berto J., van Dijk Arie P. J., Groenink Maarten, Nieuwkerk Pythia T., van der Plas Mart N., Sieswerda Gertjan T., Konings Thelma C., Mulder Barbara J. M. Relation of Physical Activity, Cardiac Function, Exercise Capacity, and Quality of Life in Patients With a Systemic Right Ventricle American journal of cardiology 2008;102 (9):1258-1262 [PubMed]

2007

• Nieuwkerk Pythia T., Tollenaar Marieke S., Oort Frans J., Sprangers Miram A. G. Are retrospective measures of change in quality of life more valid than prospective measures? Medical care 2007;45 (3):199-205 [PubMed]
• Pogany Katalin, Vanvalkengoed Irene G., Prins Jan M., Nieuwkerk Pythia T., van der Ende Ineke, Kauffman Robbert H., Kroon Frank P., Verbon Annelies, Nievaard Marianne F., Lange Joep M. A., Brinkman Kees Effects of active treatment discontinuation in patients with a CD4(+) T-cell nadir greater than 350 cells/mm(3) JOURNAL OF ACQUIRED IMMUNE DEFICIENCY SYNDROMES 2007;44 (4):395-400 [PubMed]
• van Beers Eduard J., van Tuijn Charlotte F. J., Nieuwkerk Pythia T., Friederich Philip W., Vranken Jan H., Biemond Bart J. Patient-controlled analgesia versus continuous infusion of morphine during vaso-occlusive crisis in sickle cell disease, a randomized controlled trial American journal of hematology 2007;82 (11):955-960 [PubMed]
• Nieuwkerk Pythia T., Hillebrand-Haverkort Milly E., Vriesendorp Robert, Frissen P. H. Jos, de Wolf Frank, Sprangers Mirjam A. G. Quality of life after starting highly active antiretroviral therapy for chronic HIV-1 infection at different CD4 cell counts JOURNAL OF ACQUIRED IMMUNE DEFICIENCY SYNDROMES 2007;45 (5):600-601 [PubMed]

2006

• Nieuwkerk P. T. Highly active antiretroviral therapy for HIV01 infection: patients' quality of life and treatment adherence 2006. 142p. [UvA Dissertations Online] University of Amsterdam. (Supervisors: Sprangers M. A. G., Lange J. M. A.)
• el Moussaoui Rachida, Opmeer Brent C., de Borgie Corianne A. J. M., Nieuwkerk Pythia, Bossuyt Patrick M. M., Speelman Peter, Prins Jan M. Long-term symptom recovery and health-related quality of life in patients with mild-to-moderate-severe community-acquired pneumonia Chest 2006;130 (4):1165-1172 [PubMed]
• Locadia Mirjam, van Grieken Rosa A., Prins Jan M., de Vries Henry J. C., Sprangers Mirjam A. G., Nieuwkerk Pythia T. Patients' preferences regarding the timing of highly active antiretroviral therapy initiation for chronic asymptomatic HIV-1 infection Antiviral therapy 2006;11 (3):335-341 [PubMed]
• Smets E. M. A., Nieuwkerk P. T., Hoos A. M. Therapietrouwin: A. A. Kaptein, R. A. M. Erdman, J. B. Prins, H. B. M. van de Wiel, editors. Medische psychologie. Houten: Bohn Stafleu Van Loghum; 2006. p. 119-126

2005

• Nieuwkerk Pythia T., Oort Frans J. Self-reported adherence to antiretroviral therapy for HIV-1 infection and virologic treatment response - A meta-analysis JOURNAL OF ACQUIRED IMMUNE DEFICIENCY SYNDROMES 2005;38 (4):445-448 [PubMed]
• Bayram Neriman, van Wely Madelon, van der Veen Fulco, Bossuyt Patrick M. M., Nieuwkerk Pythia Treatment preferences and trade-offs for ovulation induction in clomiphene citrate-resistant patients with polycystic ovary syndrome Fertility and sterility 2005;84 (2):420-425 [PubMed]

2004

• Nieuwkerk Pythia T. Author! Author! JAMA 2004;292 (15):1815-6; author reply 1816 [PubMed]
• Nieuwkerk Pythia T. Does electronic monitoring of adherence reduce social desirability on patients' self-reports of adherence? JOURNAL OF ACQUIRED IMMUNE DEFICIENCY SYNDROMES 2004;36 (3):880 [PubMed]
• van der Valk Marc, Casula Miriam, Weverlingz Gerrit-Jan, van Kuijk Kees, van Eck-Smit Berthe, Hulsebosch Hendrick-Jan, Nieuwkerk Pythia, van Eeden Arne, Brinkman Kees, Lange Joep, de Ronde Anthony, Reiss Peter Prevalence of lipoatrophy and mitochondrial DNA content of blood and subcutaneous fat in HIV-1-infected patients randomly allocated to zidovudine- or stavudine-based therapy Antiviral therapy 2004;9 (3):385-393 [PubMed]

2003

• Nieuwkerk Pythia T. Electronic monitoring of adherence to highly active antiretroviral therapy changes medication-taking behaviour? AIDS (London, England) 2003;17 (9):1417-1418 [PubMed]
• Burger David M., Hugen Patricia W. H., Aarnoutse Rob E., Hoetelmans Richard M. W., Jambroes Marielle, Nieuwkerk Pythia T., Schreij Gerrit, Schneider Margriet M. E., van der Ende Marchina E., Lange Joep M. A. Treatment failure of nelfinavir-containing triple therapy can largely be explained by low nelfinavir plasma concentrations Therapeutic drug monitoring 2003;25 (1):73-80 [PubMed]

2002

• Nieuwkerk P. T., Lange J. M. A., Sprangers M. A. G. Adherence to HAART: Why is it so difficult? Archives of internal medicine 2002;162:1197-1198
• Nieuwkerk P. T., Lange J. M. A. Full adherence to HAART: is it really necessary? Archives of internal medicine 2002;162:945
• Lettinga Kamilla D., Verbon Annelies, Nieuwkerk Pythia T., Jonkers Rene E., Gersons Berthold P. R., Prins Jan M., Speelman Peter Health-related quality of life and posttraumatic stress disorder among survivors of an outbreak of Legionnaires disease Clinical infectious diseases 2002;35 (1):11-17 [PubMed]
• Hugen Patricia W. H., Burger David M., Aarnoutse Rob E., Baede Patricia A., Nieuwkerk Pythia T., Koopmans Peter P., Hekster Yechiel A. Therapeutic drug monitoring of HIV-protease inhibitors to assess noncompliance Therapeutic drug monitoring 2002;24 (5):579-587 [PubMed]
• Kooiman E. L. M., Dieleman J. P., Gyssens I. C., Nieuwkerk P. T., de Marie S., van der Ende M. E. Therapietrouw onder HIV-geïnfecteerden in Rotterdam: onafhankelijk van nationaliteit slechter bij heteroseksueel besmette patiënten, intraveneuzedruggebruikers, negroïde en Latijns-Amerikaanse patiënten Nederlands tijdschrift voor geneeskunde 2002;146 (25):1183-1187

2001

• Nieuwkerk P., Gisolf E., Sprangers M., Danner S. Adherence over 48 weeks in an antiretroviral clinical trial: variable within patients, affected by toxicities and independently predictive of virological response Antiviral therapy 2001;6 (2):97-103 [PubMed]
• Nieuwkerk P. T., Sprangers M. A., Burger D. M., Hoetelmans R. M., Hugen P. W., Danner S. A., van der Ende M. E., Schneider M. M., Schrey G., Meenhorst P. L., Sprenger H. G., Kauffmann R. H., Jambroes M., Chesney M. A., de Wolf F., Lange J. M. Limited patient adherence to highly active antiretroviral therapy for HIV-1 infection in an observational cohort study Archives of internal medicine 2001;161 (16):1962-1968 [PubMed]
• Nieuwkerk P. T., Gisolf E. H., Reijers M. H., Lange J. M., Danner S. A., Sprangers M. A. Long-term quality of life outcomes in three antiretroviral treatment strategies for HIV-1 infection AIDS (London, England) 2001;15 (15):1985-1991 [PubMed]

2000

• Nieuwkerk P. T., Gisolf E. H., Colebunders R., Wu A. W., Danner S. A., Sprangers M. A. Quality of life in asymptomatic- and symptomatic HIV infected patients in a trial of ritonavir/saquinavir therapy. The Prometheus Study Group AIDS (London, England) 2000;14 (2):181-187 [PubMed]
• Nieuwkerk P. T., Reijers M. H., Weigel H. M., Lange J. M., Sprangers M. A. Quality of life in maintenance vs prolonged induction therapy for HIV JAMA 2000;284 (2):178-179 [PubMed]

1998

• Nieuwkerk P. T., Hajenius P. J., Ankum W. M., van der Veen F., Wijker W., Bossuyt P. M. Systemic methotrexate therapy versus laparoscopic salpingostomy in patients with tubal pregnancy. Part I. Impact on patients' health-related quality of life Fertility and sterility 1998;70 (3):511-517 [PubMed]
• Nieuwkerk P. T., Hajenius P. J., van der Veen F., Ankum W. M., Wijker W., Bossuyt P. M. Systemic methotrexate therapy versus laparoscopic salpingostomy in tubal pregnancy. Part II. Patient preferences for systemic methotrexate Fertility and sterility 1998;70 (3):518-522 [PubMed]