1. Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
2. Department of Internal Medicine, Gyeongsang National University College of Medicine and Gyeongsang National University Changwon Hospital, Changwon, Korea
3. Department of Internal Medicine and Liver Research Institute, Seoul National University, Seoul, Korea
4. Medical Research Collaborating Center, Seoul National University Bundang Hospital, Seongnam, Korea
5. Department of Internal Medicine, Institute of Health Sciences, Gyeongsang National University College of Medicine and Gyeongsang National University Hospital, Jinju, Korea