1. Division of Gastroenterology and Hepatology, Department of Internal Medicine, Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Korea
2. Division of Gastroenterology, Department of Internal Medicine, Ewha Womans University Mokdong Hospital, Ewha Womans University College of Medicine, Seoul, Korea
3. Division of Gastroenterology, Department of Internal Medicine, Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea
4. Department of Health Promotion Medicine, Ewha Womans University Seoul Hospital, Ewha Womans University College of Medicine, Seoul, Korea
5. Division of Gastroenterology, Department of Internal Medicine, Jeju National University Hospital, Jeju National University College of Medicine, Jeju, Korea
6. Digestive Disease Center, CHA Bundang Hospital, CHA University, Seongnam, Korea
7. Division of Gastroenterology, Department of Internal Medicine, Hallym University Chuncheon Sacred Heart Hospital, Hallym University College of Medicine, Chuncheon, Korea
8. Center for Colorectal Cancer, National Cancer Center, Goyang, Korea
9. Division of Gastroenterology, Department of Internal Medicine, Hallym University Dongtan Sacred Heart Hospital, Hallym University College of Medicine, Hwaseong, Korea
10. Division of Gastroenterology and Hepatology, Department of Internal Medicine, Jeonbuk National University Hospital, Jeonbuk National University Medical School, Jeonju, Korea
11. Division of Healthcare Technology Assessment Research, National Evidence-based Healthcare Collaborating Agency, Seoul, Korea
12. Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea