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. Erasmus Medical Centre; Rotterdam The Netherlands
4. Amphia Hospital; Breda The Netherlands
5. University Medical Centre Groningen; University of Groningen; Groningen The Netherlands
6. University Medical Centre Utrecht; Utrecht The Netherlands
7. Amsterdam University Medical Centre; Academic Medical Centre; Amsterdam The Netherlands
8. Zuyderland Medical Centre; Sittard The Netherlands
9. Leiden University Medical Centre; Leiden The Netherlands
10. Amsterdam University Medical Centre; Vrije Universiteit; Amsterdam Gastroenterology & Metabolism research institute; Amsterdam The Netherlands
11. Haaglanden Medisch Centre; The Hague The Netherlands
12. Franciscus Gasthuis & Vlietland; Rotterdam The Netherlands
13. Jeroen Bosch Hospital; 's Hertogenbosch The Netherlands
14. Rijnstate Hospital; Arnhem The Netherlands
15. Onze Lieve Vrouwe Gasthuis; Amsterdam The Netherlands