1Department of Gastroenterology, Yokohama City University Graduate School of Medicine, Yokohama, Japan
2Department of Biostatistics and Epidemiology, Yokohama City University Graduate School of Medicine, Yokohama, Japan
3Department of Medicine and Molecular Science, Graduate School of Biomedical Sciences, Hiroshima University, Hiroshima, Japan
4Department of Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, Kamigyo-ku, Kyoto, Japan
5Department of Gastroenterology and Hepatology, Kochi Medical School, Kochi, Japan
6Division of Hepatology, Saga Medical School, Liver Center, Saga, Japan
7Department of Radiology, Yokohama City University, Graduate School of Medicine, Yokohama, Japan
8Department of Pharmacology, Shimane University Faculty of Medicine, Izumo, Shimane, Japan