1. Department of Surgery, Amsterdam Gastroenterology and Metabolism, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands
2. Department of Gastroenterology and Hepatology, Erasmus MC, University Medical Center, Rotterdam, Amsterdam, the Netherlands
3. Department of Gastroenterology and Hepatology; Amsterdam Gastroenterology and Metabolism, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands
4. Department of Radiology, St Antonius Hospital, Nieuwegein, the Netherlands
5. Department of Surgery, Maastricht University Medical Center+, Maastricht, the Netherlands
6. Department of Surgery, Universitätsklinikum Aachen, Aachen, Germany
7. Department of Surgery, Gelre Hospital, Apeldoorn, the Netherlands
8. Department of Gastroenterology and Hepatology, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
9. Department of Surgery, Erasmus MC, University Medical Center, Rotterdam, the Netherlands
10. Department of Surgery, Radboud University Medical Center, Nijmegen, the Netherlands
11. Department of Gastroenterology and Hepatology, Maasstad Hospital, Rotterdam, the Netherlands
12. Department of Surgery, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
13. Department of Gastroenterology and Hepatology, Zuyderland Hospital, Sittard/Heerlen, the Netherlands
14. Department of Surgery, Isala Hospital, Zwolle, the Netherlands
15. Department of Gastroenterology and Hepatology, Isala Hospital, Zwolle, the Netherlands
16. Department of Gastroenterology and Hepatology, Canisius-Wilhemina Hospital, Nijmegen, the Netherlands
17. Department of Gastroenterology and Hepatology, Martini Hospital, Groningen, the Netherlands
18. Department of Gastroenterology and Hepatology, St Antonius Hospital, Nieuwegein, the Netherlands
19. Department of Gastroenterology and Hepatology, Gelderse Vallei Hospital, Ede, the Netherlands
20. Department of Surgery, St Antonius Hospital, Nieuwegein, the Netherlands
21. Department of Surgery, University Medical Center Utrecht, Utrecht, the Netherlands
22. Department of Clinical Epidemiology, Biostatistics, and Bioinformatics, Amsterdam Public Health, Amsterdam UMC, University of Amsterdam, the Netherlands