1. Department of Internal Medicine, Pusan National University College of Medicine and Biomedical Research Institute, Pusan National University Hospital, Busan, Korea
2. Department of Internal Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
3. Department of Internal Medicine, Yeouido St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
4. Department of Internal Medicine, Jeonbuk National University Hospital, Jeonju, Korea
5. Department of Internal Medicine, Korea University Anam Hospital, Seoul, Korea
6. Department of Internal Medicine, SMG-SNU Boramae Medical Center, Seoul National University of College of Medicine, Seoul, Korea
7. Department of Internal Medicine, Wonkwang University Hospital, Wonkwang University College of Medicine, Iksan, Korea
8. Department of Gastroenterology and Hepatology, College of Medicine, Kyung Hee University, Seoul, Korea
9. Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
10. Department of Internal Medicine, Chung-Ang University College of Medicine, Seoul, Korea
11. Department of Internal Medicine, Chungbuk National University Hospital, Chungbuk National University College of Medicine, Cheongju, Korea
12. Department of Internal Medicine, Ewha Womans University College of Medicine, Seoul, Korea
13. Department of Internal Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
14. Department of Internal Medicine, School of Medicine, Kyungpook National University, Daegu, Korea
15. Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
16. Department of Internal Medicine, Dong-A University College of Medicine, Busan, Korea
17. Department of Internal Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea
18. Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
19. Department of Internal Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
20. Division of Gastroenterology, Department of Internal Medicine, Konyang University College of Medicine, Daejeon, Korea
21. Department of Gastroenterology, Ajou University School of Medicine, Suwon, Korea
22. Department of Internal Medicine, Soonchunhyang University College of Medicine, Bucheon, Korea
23. Daewoong Pharmaceutical Co., Ltd., Seoul, Korea
24. Department of Internal Medicine, Hanyang University College of Medicine, Seoul, Korea