1. Department of Gastroenterology and Hepatology Erasmus MC Cancer Institute University Medical Center Rotterdam The Netherlands
2. Department of Pathology Erasmus MC Cancer Institute University Medical Center Rotterdam The Netherlands
3. Department of Pathology Isala Clinics Zwolle The Netherlands
4. Department of Public Health Erasmus MC Cancer Institute University Medical Center Rotterdam The Netherlands
5. Department of Gastroenterology and Hepatology University Medical Center Utrecht Utrecht The Netherlands
6. Department of Gastroenterology and Hepatology St. Antonius Hospital Nieuwegein The Netherlands
7. Department of Pathology University Medical Center Utrecht Utrecht The Netherlands
8. Department of Surgery University Medical Center Utrecht Utrecht The Netherlands
9. Department of Pathology Pathology DNA St. Antonius Hospital Nieuwegein The Netherlands
10. Department of Gastroenterology and Hepatology Isala Clinics Zwolle The Netherlands
11. Department of Gastroenterology and Hepatology Catharina Hospital Eindhoven The Netherlands
12. Department of Pathology PAMM Eindhoven The Netherlands
13. Department of Gastroenterology and Hepatology Ijsselland Hospital Capelle aan den Ijssel The Netherlands
14. Department of Pathology Ijselland Hospital Capelle aan den Ijssel The Netherlands
15. Department of Gastroenterology and Hepatology University Medical Center Groningen Groningen The Netherlands
16. Department of Pathology University Medical Center Groningen Groningen The Netherlands
17. Department of Surgery University Medical Center Groningen Groningen The Netherlands
18. Department of Gastroenterology and Hepatology Haga Teaching Hospital Den Haag The Netherlands
19. Department of Pathology Haga Teaching Hospital Den Haag The Netherlands
20. Department of Gastroenterology and Hepatology Amsterdam University Medical Centers Amsterdam The Netherlands
21. Department of Pathology Amsterdam University Medical Centers Amsterdam The Netherlands
22. Department of Surgery Amsterdam University Medical Centers Amsterdam The Netherlands
23. Department of Surgery Erasmus MC Cancer Institute University Medical Center Rotterdam The Netherlands