1 Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea.
2 Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea.
3 Department of Internal Medicine, SoonChunHyang University Bucheon Hospital, Bucheon, Korea.
4 Center for Liver and Pancreatobiliary Cancer, National Cancer Center, Goyang, Korea.
5 Department of Internal Medicine, Konyang University College of Medicine, Daejeon, Korea.
6 Department of Internal Medicine, Keimyung University School of Medicine, Daegu, Korea.
7 Department of Internal Medicine, Nowon Eulji Medical Center, Eulji University School of Medicine, Seoul, Korea.
8 Department of Pathology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea.
9 Department of Internal Medicine, Hanyang University College of Medicine, Seoul, Korea.
10 Department of Radiology, Seoul St.Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
11 Department of Internal Medicine, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
12 Department of Internal Medicine, Seoul Metropolitan Government Boramae Medical Center, Seoul National University College of Medicine, Seoul, Korea.
13 Department of Internal Medicine, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, Korea.
14 Division of Gastroenterology, Hepatology and Nutrition, Department of Pediatrics, Yonsei University College of Medicine, Severance Children's Hospital, Seoul, Korea.
15 Division of Pediatric Gastroenterology Hepatology and Nutrition, CHA Bundang Medical Center, CHA University, Seongnam, Korea.
16 Department of Internal Medicine, Inha University Hospital, Inha University School of Medicine, Incheon, Korea.
17 Division of Gastroenterology and Hepatology, Department of Internal Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea.