1. Gastrointestinal Endoscopy Excellence Center and Division of Gastroenterology Department of Medicine Faculty of Medicine Chulalongkorn University and King Chulalongkorn Memorial Hospital Thai Red Cross Society Bangkok Thailand
2. Pancreas Research Unit Department of Medicine Faculty of Medicine Chulalongkorn University Bangkok Thailand
3. Department of Hepatogastroenterology Sindh Institute of Urology and Transplantation Karachi Pakistan