1. Gastrointestinal Endoscopy Excellence Center and Division of Gastroenterology, Chulalongkorn University and King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand
2. Pancreas Research Unit, Chulalongkorn University, Bangkok, Thailand
3. Thai Association for Gastrointestinal Endoscopy, Bangkok, Thailand
4. Department of Surgery, Tha-Bo Crown Prince Hospital, Ministry of Public Health, Nong Khai, Thailand
5. Department of Surgery, Roi-Et Hospital, Ministry of Public Health, Roi-Et, Thailand
6. Biostatistics Excellence Centre, Chulalongkorn University, Bangkok, Thailand
7. Department of Surgery, Rajavithi Hospital, Ministry of Public Health, Bangkok, Thailand