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