1. Division of Gastroenterology, Department of Internal Medicine and Gastrointestinal Cancer Center, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
2. Department of Internal Medicine, Chonnam National University Medical School, Gwangju, Korea
3. Department of Internal Medicine, Pusan National University School of Medicine, Busan, Korea
4. Division of Gastroenterology, Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
5. Department of Internal Medicine, Kyung Hee University College of Medicine, Seoul, Korea
6. Department of Internal Medicine, Healthcare Research Institute, Healthcare System Gangnam Center, Seoul National University Hospital, Seoul, Korea
7. Division of Gastroenterology, Kyungpook National University Hospital and School of Medicine, Kyungpook National University, Daegu, Korea
8. Division of Gastroenterology, Department of Internal Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
9. Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
10. Department of Internal Medicine, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Korea
11. Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
12. Department of Internal Medicine, Hallym University College of Medicine, Seoul, Korea
13. Division of Gastroenterology, Department of Internal Medicine, Hanyang University College of Medicine, Seoul, Korea
14. Division of Gastroenterology, Department of Internal Medicine, Incheon St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Incheon, Korea
15. Department of Internal Medicine, Kosin University College of Medicine, Busan, Korea
16. Department of Internal Medicine, Sanggye Paik Hospital, Inje University College of Medicine, Seoul, Korea
17. Department of Internal Medicine, Ewha Womans University College of Medicine, Seoul, Korea
18. Center for Gastric Cancer, National Cancer Center, Goyang, Korea