1. Division of Gastroenterology, Department of Internal Medicine, Seoul Metropolitan Government Seoul National University Boramae Medical Center, Seoul National University College of Medicine, Seoul, Republic of Korea
2. Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea
3. Department of Dermatology, Boramae Medical Center, Seoul Metropolitan Government Seoul National University, Seoul, Republic of Korea
4. Department of Education and Training, Seoul National University Hospital, Seoul, Republic of Korea
5. Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam-si, Republic of Korea
6. Department of Internal Medicine and Healthcare Research Institute, Seoul National University Hospital Healthcare System Gangnam Center, Seoul, Korea