1. Department of Internal Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
2. Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
3. Division of Gastroenterology, Department of Internal Medicine, Cha Bundang Medical Center, Seongnam, Korea
4. Department of Internal Medicine, Chonnam National University Medical School, Gwangju, Korea
5. Division of Gastroenterology, Department of Internal Medicine, Chung-Ang University College of Medicine, Seoul, Korea
6. Department of Internal Medicine, Chungnam National University College of Medicine, Daejeon, Korea
7. Department of Internal Medicine, Dong-A University College of Medicine, Busan, Korea
8. Department of Internal Medicine, Gangneung Asan Hospital, University of Ulsan College of Medicine, Gangneung, Korea
9. Department of Gastroenterology, Gachon University Gil Medical Center, Gachon University College of Medicine, Incheon, Korea
10. Department of Internal Medicine, Inje University Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea
11. Division of Gastroenterology, Department of Internal Medicine, Jeonbuk National University Hospital, Jeonbuk National University Medical School, Jeonju, Korea
12. Division of Gastroenterology and Hepatology, Department of Internal Medicine, Keimyung University School of Medicine, Daegu, Korea
13. Department of Gastroenterology, Korea University Anam Hospital, Seoul, Korea
14. Department of Gastroenterology, Korea University Guro Hospital, Seoul, Korea
15. Division of Gastroenterology, Department of Internal Medicine, Kosin University College of Medicine, Busan, Korea
16. Division of Gastroenterology and Hepatology, Department of Internal Medicine, College of Medicine, Kyung Hee University, Seoul, Korea
17. Department of Internal Medicine, Kyungpook National University Hospital, Daegu, Korea
18. Department of Internal Medicine, Presbyterian Medical Center, Jeonju, Korea
19. Department of Internal Medicine, Pusan National University Yangsan Hospital, Yangsan, Korea
20. Department of Internal Medicine, Pusan National University College of Medicine and Biomedical Research Institute, Pusan National University Hospital, Busan, Korea
21. Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
22. Department of Internal Medicine and Liver Research Institute, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
23. Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
24. Department of Internal Medicine, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
25. Department of Internal Medicine, Soonchunhyang University College of Medicine, Bucheon, Korea
26. Department of Internal Medicine, Wonju Severance Christian Hospital, Wonju, Korea
27. Clinical R & D Department, Daewon Pharmaceutical, Seoul, Korea
28. Department of Gastroenterology, Korea University Ansan Hospital, Ansan, Korea