1. Department of Gastroenterology and Hepatology; Musashino Red Cross Hospital; Tokyo Japan
2. Department of Radiology; Musashino Red Cross Hospital; Tokyo Japan
3. First Department of Internal Medicine; University of Yamanashi; Yamanashi Japan
4. Third Department of Internal Medicine; University of Occupational and Environmental Health; Kitakyushu Japan
5. Liver Disease Control; Tokyo Medical and Dental University; Tokyo Japan