1. Department of Gastroenterology, CHA Bundang Medical Center, CHA University School of Medicine, Seongnam, Republic of Korea
2. Department of Gastroenterology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Republic of Korea
3. Department of Pathology, Seoul National University College of Medicine, Seoul, Republic of Korea
4. Department of Internal Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
5. Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea
6. Department of Internal Medicine and Healthcare Research Institute, Healthcare System Gangnam Center, Seoul National University Hospital, Seoul, Republic of Korea