1. Department of Gastroenterology and Hepatology; Radboud University Medical Centre; Nijmegen The Netherlands
2. Department of Gastroenterology and Hepatology; Maastricht University Medical Centre; Maastricht The Netherlands
3. University Medical Centre Groningen; Groningen The Netherlands
4. Amsterdam University Medical Centre; Vrije Universiteit; Amsterdam The Netherlands
5. Amsterdam Gastroenterology & Metabolism research institute; Amsterdam The Netherlands
6. University of Groningen; Groningen the Netherlands
7. Franciscus Gasthuis & Vlietland; Rotterdam The Netherlands