1. Department of Internal Medicine, Ewha Womans University College of Medicine, Seoul, Korea
2. Department of Internal Medicine, Keimyung University School of Medicine, Daegu, Korea
3. Division of Gastroenterology, Department of Internal Medicine, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Korea
4. Department of Internal Medicine, Hanyang University Guri Hospital, Hanyang University College of Medicine, Guri, Korea
5. Department of Internal Medicine, Hallym University College of Medicine, Chuncheon, Korea
6. Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
7. Department of Internal Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
8. Division of Gastroenterology and Hepatology, Department of Internal Medicine, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Korea
9. National Evidence-Based Healthcare Collaborating Agency, Seoul, Korea
10. Department of Gastroenterology, Dongguk University Ilsan Hospital, Goyang, Korea
11. Korean College of Helicobacter and Upper Gastrointestinal Research-Metabolism, Obesity & Nutrition Research Group, Seoul, Korea
12. Division of Gastroenterology, Department of Internal Medicine, Eunpyeong St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
13. Korean Society of Gastrointestinal Endoscopy-The Research Group for Endoscopes and Devices, Seoul, Korea
14. Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
15. Department of Internal Medicine, Pusan National University Hospital, Pusan National University College of Medicine and Biomedical Research Institute, Busan, Korea
16. Division of Gastroenterology, Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Bucheon, Korea
17. Department of Internal Medicine, Hanyang University School of Medicine, Seoul, Korea