1. Montreal University Hospital Research Center, Montreal, Quebec, Canada;
2. Division of Gastroenterology, Montreal University Hospital Center (CHUM), Montreal, Quebec, Canada;
3. Division of Internal Medicine, Montreal University Hospital Center (CHUM), Montreal, Quebec, Canada;
4. Gastroenterology and Endoscopy Division, Edouard Herriot University Hospital, Hospices Civils de Lyon, France;
5. Endoscopy Division, National Cancer Center Hospital, Tokyo, Japan;
6. Division of Digestive and Liver Diseases, Department of Medicine, Columbia University Irving Medical Center, New York, New York, USA;
7. Department of Surgery, Institute of Digestive Disease, Faculty of Medicine, The Chinese University of Hong Kong;
8. Department of Surgery, University Hospitals Cleveland Medical Center, Cleveland, USA;
9. Division of Surgery, Montreal University Hospital Center (CHUM), Montreal, Quebec, Canada;
10. Division of Gastroenterology and Hepatology, University of Toronto, Toronto, Ontario, Canada;
11. Showa University Northern Yokohama Hospital, Digestive Disease Center, Yokohama, Japan.