1. Department of Internal Medicine, Gyeongsang National University Changwon Hospital Gyeongsang National University College of Medicine Changwon South Korea
2. Department of Statistics and Actuarial Science Soongsil University Seoul South Korea
3. Department of Internal Medicine and Liver Research Institute, Seoul National University Hospital Seoul National University College of Medicine Seoul South Korea
4. Department of Internal Medicine, Kangwon National University Hospital Kangwon National University School of Medicine Chuncheon South Korea