1. Department of Internal Medicine; Hanyang University College of Medicine; Seoul South Korea
2. Department of Internal Medicine, College of Medicine; Soonchunhyang University; Bucheon South Korea
3. Division of Gastroenterology and Hepatology Kangnam; Sacred Heart Hospital Hallym University Medical Center; Bucheon South Korea
4. Department of Pathology; Soon Chun Hyang University Seoul Hospital; Seoul South Korea
5. Clinical Research Center; Asan Medical Center; Seoul South Korea
6. Department of Internal Medicine; Inha University School of Medicine; Incheon South Korea
7. Department of Internal Medicine; Yonsei University Wonju College of Medicine; Seoul South Korea
8. Department of Internal Medicine; Kangwon National University School of Medicine; Chuncheon South Korea
9. Department of Internal Medicine; Kangbuk SaProfessorung Hospital, Sungkyunkwan University School of Medicine; Seoul South Korea
10. Division of Gastroenterology and Hepatology, Department of Internal Medicine; Korea University College of Medicine; Seoul South Korea
11. Department of Internal Medicine; Hanyang University College of Medicine; Guri South Korea