1. Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon,
2. Department of Internal Medicine, The Catholic University of Korea College of Medicine, Seoul, Korea
3. Department of Internal Medicine, Inje University Seoul Paik Hospital, Inje University College of Medicine, Seoul, Korea
4. Department of Internal Medicine, Hallym University College of Medicine, Seoul, Korea
5. Department of Internal Medicine, Chung-Ang University College of Medicine, Seoul, Korea
6. Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
7. Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
8. Department of Internal Medicine, Kyung Hee University School of Medicine, Seoul, Korea
9. Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
10. Department of Internal Medicine, Hanyang University College of Medicine, Seoul, Korea
11. Department of Internal Medicine, Korea University Ansan Hospital, Korea University College of Medicine, Ansan, Korea
12. epartment of Preventive Medicine, Soonchunhyang University College of Medicine, Cheonan, Korea
13. Department of Gastroenterology, The First Affiliated Hospital, Anhui Medical University, Hefei,
14. Department of Gastroenterology and Hepatology, General Hospital, Tianjin Medical University, Tianjin,
15. Department of Gastroenterology, The Second Affiliated Hospital and Yuying Children’s Hospital, Wenzhou Medical University, Wenzhou, China
16. Department of Gastroenterology, Shanghai East Hospital, Tongji University, Shanghi, China
17. Department of Gastroenterology, Ruijin Hospital, Shanghai Jiaotong University, Shanghi, China
18. Department of Internal Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
19. Department of Internal Medicine, University of Santo Tomas Hospital, Manila, Philippines