1. Division of Gastroenterology, Department of Internal Medicine, International St. Mary’s Hospital, Catholic Kwandong University College of Medicine, Incheon, Korea
2. Department of Pathology, International St. Mary’s Hospital, Catholic Kwandong University College of Medicine, Incheon, Korea
3. Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
4. Division of Gastroenterology, Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea