1. Faculty of Medicine, University of Health Sciences, Phnom Penh, Cambodia
2. Cambodian Association of Gastrointestinal Endoscopy (CAGE), Phnom Penh Cambodia
3. Department of Endoscopy and Gastroenterology, Dupuytren University Hospital, Limoges, France
4. Department of Endoscopy and Gastroenterology, Pavillon L, Edouard Herriot Hospital, Lyon, France
5. Gastroenterology and Hepatology, Charcot Clinic, Lyon, France