1. Humanitas University, Department of Biomedical Sciences, Pieve Emanuele, and Humanitas Clinical and Research Center IRCCS, Endoscopy Unit, Rozzano, Italy (C.H., M.S., A.R.)
2. Digestive Disease Center, Showa University Northern Yokohama Hospital, Yokohama, Japan (M.M., S.K.)
3. Humanitas Clinical and Research Center IRCCS, Endoscopy Unit, Rozzano, Italy (T.R., L.C.)
4. Digestive Disease Center, Showa University Northern Yokohama Hospital, Yokohama, Japan; University of Oslo, Clinical Effectiveness Research Group, and Department of Transplantation Medicine, Oslo University Hospital, Oslo, Norway (Y.M.)
5. Division of Gastroenterology, Hepatology, and Nutrition, University of Minnesota, and VA Health Care System, Minneapolis, Minnesota (S.S.)
6. University of Foggia, Department of Medical Sciences, Section of Gastroenterology, Foggia, Italy (A.F.)
7. Gastroenterology and Digestive Endoscopy Unit, Ospedale dei Castelli, Ariccia, and Department of Anatomical, Histological, Forensic Medicine and Orthopedics Sciences, Sapienza University of Rome, Rome, Italy (G.A.)
8. Department of Gastroenterology and Hepatology, Amsterdam University Medical Center, Amsterdam, the Netherlands (B.B.S.L.H.)
9. Gastroenterology Unit, Valduce Hospital, Como, Italy (E.R.)
10. Kansas City VA Medical Center, Gastroenterology and Hepatology, Kansas City, Missouri (H.P., P.S.)
11. Division of Gastroenterology, St. Michael's Hospital, University of Toronto, Toronto, Ontario, Canada (K.K.)
12. Department of Gastroenterology and Hepatology, Changi General Hospital, Singapore Health Services, and Duke-NUS Academic Medicine Centre, Singapore Health Services, Singapore (J.W.L.)
13. Endoscopy Unit, Gastroenterology Department, Clinical Institute of Digestive and Metabolic Disease, Hospital Clínic de Barcelona, University of Barcelona, Barcelona, Spain (G.M.F.)
14. Queen Alexandra Hospital, Department of Gastroenterology, Portsmouth, United Kingdom (P.B.)
15. Department of Gastroenterology and Hepatology, Amsterdam University Medical Center, and Bergman Clinics Maag and Darm Amsterdam, Amsterdam, the Netherlands (E.D.)
16. Department of Gastroenterology, Tisch Hospital, New York University Langone Medical Center, New York, New York (S.G.)
17. Center for Advanced Endoscopy, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts (T.B.)
18. Department of Medicine, Lovisenberg Diaconal Hospital, Oslo, Norway (P.O.V.)
19. Indiana University School of Medicine, Division of Gastroenterology, Indianapolis, Indiana (D.K.R.)
20. Ted Rogers Centre for Heart Research, University Health Network, Toronto, Ontario, Canada (F.F.).