1. Department of Medicine, Faculty of Medicine; Chulalongkorn University and King Chulalongkorn Memorial Hospital; Bangkok Thailand
2. National Gastric Cancer and Gastrointestinal Diseases Research Center; Bangkok Pathumthani Thailand
3. Department of Medicine; Thammasat University Hospital; Khlong Luang Pathumthani Thailand
4. Department of Medicine; Thonburi Hospital; Bangkok Thailand
5. Department of Medicine; Siriraj Hospital, Mahidol University; Bangkok Thailand
6. Department of Medicine, Ramathibodi Hospital; Mahidol University; Bangkok Thailand
7. Department of Medicine; Bumrungrad Hospital; Bangkok Thailand
8. Department of Medicine, Faculty of Medicine; KhonKaen University; Khon Kaen Thailand
9. Department of Gastroenterology and Hepatology; University of Jakarta; Jakarta Indonesia
10. Division of Gastroenterology and Hepatology, Department of Medicine; University of Malaya; Kuala Lumpur Malaysia
11. Department of Gastroenterology; Yangon General Hospital; Yangon Myanmar
12. Department of Internal Medicine; National Taiwan University Hospital; Taipei Taiwan
13. Department of Gastroenterology; Mahosot Hospital; Vientiane Laos
14. Calmette Hospital; University of Health Science; Phnom Penh Cambodia
15. Department of Gastroentrology and Hepatology; Changi General Hospital; Singapore
16. Section of Gastroenterology; University of Santo Tomas Hospital; Manila Philippines
17. Department of Internal Medicine; University of Medicine and Pharmacy; Hochiminh City Vietnam
18. Udonthani Hospital; Udon Thani Thailand
19. Department of Medicine; Rajavithi Hospital; Bangkok Thailand
20. Division of Gastroenterology, Department of Internal Medicine, Faculty of Medicine; University of Indonesia; Depok Indonesia
21. Department of Environmental and Preventive Medicine, Faculty of Medicine; Oita University; Yufu Japan
22. Faculty of Medicine; National University of Singapore; Singapore
23. Department of Medicine; Jichi Medical University; Tochigi Japan
24. Department of Medicine, Gastroenterology Section; Baylor College of Medicine and Michael E. DeBakey VA Medicine Center; Houston Texas USA