1. Department of Internal Medicine, College of Medicine Pusan National University, Liver Center, Research Institute of Convergence for Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, Korea.
2. Digestive Disease Center, Pusan National University Hospital, Busan, Korea.
3. Research and Statistical Support, Research Institute of Convergence for Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, Korea.