1. Department of Internal Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
2. Deprtment of Medicine, Chulalongkorn University and King Chulalongkorn Memorial Hospital, Bangkok, Thailand
3. Gastroentorology Unit, Department of Medicine, Faculty of Medicine, National University of Malaysia, Kuala Lumpur, Malaysia
4. Department of Gastroenterology, University of Medicine 1 Yangon, Yangon, Myanmar
5. Department of Endoscopy, Ulaanbaatar Songdo Hospital, Ulaanbaatar, Mongolia
6. Department of Internal Medicine, Hue University of Medicine and Pharmacy, Hue University, Hue, Vietnam
7. Department of Medicine A, University Medicine Greifswald, Greifswald, Germany
8. Department of Internal Medicine, University of Indonesia, Kota Depok, Indonesia
9. Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea