Affiliation: | (1) Department of Gastroenterology and Hepatology, Toho University Medical Center, Omori Hospital, 6-11-1, Omorinishi, Ota-ku, Tokyo 143-8541, Japan;(2) Department of Hepato-Biliary-Pancreatic Surgery, Toho University Medical Center, Omori Hospital, 6-11-1, Omorinishi, Ota-ku, Tokyo 143-8541, Japan;(3) Department of Surgical Pathology, Toho University Medical Center, Omori Hospital, 6-11-1, Omorinishi, Ota-ku, Tokyo 143-8541, Japan;(4) The Ultrasound Systems Development Department, Toshiba Medical Systems Corporation, Otawara, Tochigi, Japan |