1. Department of Internal Medicine, Seoul National University Hospital Healthcare System Gangnam Center, Seoul, Korea
2. Department of Internal Medicine, Ewha Womans University College of Medicine, Seoul, Korea
3. Department of Internal Medicine, Hallym University College of Medicine, Chuncheon, Korea
4. Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
5. CAU Thrombosis and Biomarker Center, Chung-Ang University Gwangmyeong Hospital, Gwangmyeong; Department of Internal Medicine, Chung-Ang University College of Medicine, Seoul, Korea
6. National Evidence-Based Healthcare Collaborating Agency, Seoul, Korea
7. Division of Gastroenterology and Hepatology, Department of Medicine, Stanford University, Stanford, CA, USA
8. Endoscopy Division, National Cancer Center Hospital, Tokyo, Japan
9. Division of Upper GI and Metabolic Surgery, Department of Surgery, The Chinese University of Hong Kong, Shatin, Hong Kong
10. Division of Gastroenterology, Department of Medicine, Chulalongkorn University, Bangkok, Thailand
11. Department of Gastroenterology and Hepatology, Singapore General Hospital and Duke-NUS Medical School, Singapore, Singapore
12. Departments of GI Endoscopy, 108 Central Hospital, Hanoi, Vietnam
13. Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
14. Department of Internal Medicine, Pusan National University Hospital, Pusan National University College of Medicine and Biomedical Research Institute, Busan, Korea
15. Department of Internal Medicine, Hanyang University School of Medicine, Seoul, Korea