1. Department of Gastroenterology and Hepatology, Leiden University Medical Center, Pb 9600, 2300 RC, Leiden, The Netherlands
2. Department of Research and Development, St. Antonius Hospital, Pb 2500, 3430 EM, Nieuwegein, The Netherlands
3. Department of Gastroenterology and Hepatology, Amsterdam Gastroenterology and Metabolism, Amsterdam UMC, University of Amsterdam, Pb 22660, 1100 DD, Amsterdam, The Netherlands
4. Department of Psychiatry, Academic Medical Center, Pb 22660, 1100 DD, Amsterdam, The Netherlands
5. Department of Public Health and Primary Care, Leiden University Medical Center, Pb 9600, 2300 RC, Leiden, The Netherlands
6. Department of Gastroenterology and Hepatology, St. Antonius Hospital, Pb 2500, 3430 EM, Nieuwegein, The Netherlands