1. The Catholic University Liver Research Center, Department of Biomedicine and Health Sciences, College of Medicine, The Catholic University of Korea, Seoul, Korea
2. Division of Gastroenterology and Hepatology, Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
3. Korean Armed Forces Medical Command, Seongnam, Korea
4. Military Manpower Administration, Daejeon, Korea
5. Division of Gastroenterology and Hepatology, Department of Internal Medicine, Eunpyeong St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea