About the Authors
- Merel M. Tielemans
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* E-mail: M.Tielemans@MDL.umcn.nl
Affiliations Department of Gastroenterology and Hepatology, Radboud University Medical Center, Nijmegen, the Netherlands, Department of Gastroenterology and Hepatology, University Medical Center Utrecht, Utrecht, the Netherlands
- Jeroen Jaspers Focks
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Affiliation Department of Cardiology, Radboud University Medical Center, Nijmegen, the Netherlands
- Leo G. M. van Rossum
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Affiliation Department of Epidemiology, Biostatistics and Health Technology Assessment, Radboud University Medical Center, Nijmegen, the Netherlands
- Ties Eikendal
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Affiliation Department of Gastroenterology and Hepatology, Radboud University Medical Center, Nijmegen, the Netherlands
- Jan B. M. J. Jansen
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Affiliations Department of Gastroenterology and Hepatology, Radboud University Medical Center, Nijmegen, the Netherlands, Department of Gastroenterology and Hepatology, Elkerliek Hospital, Helmond, the Netherlands
- Robert J. F. Laheij
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Affiliation Department of Gastroenterology and Hepatology, University Medical Center Utrecht, Utrecht, the Netherlands
- Martijn G. H. van Oijen
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Affiliations Department of Gastroenterology and Hepatology, University Medical Center Utrecht, Utrecht, the Netherlands, Division of Digestive Diseases, David Geffen School of Medicine at UCLA, Los Angeles, California, United States of America
Competing Interests
The authors have read the journal's policy and have the following conflicts: None of the authors are employes by Nycomed BV. Martijn G. H. van Oijen received unrestricted research grants from AstraZeneca, Nycomed BV, Janssen and Shire. He received consulting fees from Pfizer and AstraZeneca BV. Other authors do not have conflicts of interest. This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials.
Author Contributions
Performed the experiments: MMT JJF. Analyzed the data: MMT JJF MGHvO. Designed the questionnaire: MGHvO LGMvR RJFL JBMJJ. Tested the questionnaire in a previous pilot study: TE MGHvO LGMvR RJFL JBMJJ. Collected data of the present study: TE. Prepared the first draft of the manuscript: MMT MGHvO. Participated sufficiently in the adaptation of the first version of the manuscript and approved submission of the current manuscript: MMT JJF LGMvR TE JBMJJ RJFL MGHvO. Performed database management: LGMvR.