1. Department of Internal Medicine; College of Medicine, Ewha Womans University; Seoul Republic of Korea
2. Division of Gastroenterology and Hepatology, Department of Internal Medicine; Soonchunhyang University Bucheon Hospital; Bucheon Republic of Korea
3. Department of Biostatistics; Seoul Metropolitan Government Seoul National University Boramae Medical Center; Seoul Republic of Korea
4. Department of Internal Medicine, Seoul National University Hospital; Seoul National University College of Medicine; Seoul Republic of Korea
5. Department of Internal Medicine; Seoul Metropolitan Government Seoul National University Boramae Medical Center; Seoul Republic of Korea
6. Center for Liver Cancer, Research Institute and Hospital; National Cancer Center; Goyang Republic of Korea