1. Division of Gastroenterology, Department of Medicine, Faculty of Medicine, Chulalongkorn University , Bangkok 10330, Thailand
2. Program in Clinical Sciences (International Program), Graduate Affairs, Faculty of Medicine, Chulalongkorn University , Bangkok 10330, Thailand
3. Department of Clinical Services, Ma Har Myaing Hospital , 308, Pyay Road, Sanchaung Township , Yangon, 11111, Myanmar
4. Division of Diagnostic Radiology, Department of Radiology, Faculty of Medicine, King Chulalongkorn Memorial Hospital , Bangkok, 10330, Thailand
5. Center of Excellence for Innovation and Endoscopy in Gastrointestinal Oncology, Faculty of Medicine, Chulalongkorn University , Bangkok 10330, Thailand