1. Division of Gastroenterology, Department of Internal Medicine, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
2. Division of Gastroenterology, Department of Internal Medicine, Hallym University College of Medicine, Hwaseong, Korea
3. Department of Internal Medicine, Research Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University Hospital, Jeonju, Korea
4. Department of Internal Medicine, School of Medicine, Kyungpook National University, Daegu, Korea
5. Division of Gastroenterology, Department of Internal Medicine, Dankook University College of Medicine, Cheonan, Korea
6. Division of Gastroenterology, Department of Internal Medicine, Jeju National University College of Medicine, Jeju, Korea
7. Division of Gastroenterology, Department of Internal Medicine, Soonchunhyang University College of Medicine, Cheonan, Korea
8. Division of Gastroenterology, Department of Internal Medicine, Chonnam National University College of Medicine, Gwangju, Korea
9. Division of Gastroenterology, Department of Internal Medicine, Dongguk University College of Medicine, Goyang, Korea
10. Division of Gastroenterology, Department of Internal Medicine, University of Ulsan College of Medicine, Seoul, Korea
11. Division of Gastroenterology, Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea
12. Division of Gastroenterology, Department of Internal Medicine, Inje University College of Medicine, Busan, Korea
13. Division of Gastroenterology, Department of Internal Medicine, Inha University College of Medicine, Incheon, Korea
14. Division of Gastroenterology, Department of Internal Medicine, Kyung Hee University College of Medicine, Seoul, Korea
15. Division of Healthcare Technology Assessment Research, Office of Health Technology Assessment Research, National Evidence-Based Healthcare Collaborating Agency, Seoul, Korea
16. Division of Gastroenterology, Department of Internal Medicine, Daegu Catholic University School of Medicine, Daegu, Korea
17. Division of Gastroenterology, Department of Internal Medicine, Hanyang University College of Medicine, Seoul, Korea
18. Division of Gastroenterology, Department of Internal Medicine, Chosun University College of Medicine, Gwangju, Korea
19. Division of Gastroenterology, Department of Internal Medicine, Cha University College of Medicine, Seongnam, Korea