1. Department of Medical Oncology, Kyorin University Faculty of Medicine, Japan
2. Department of Hepato-Biliary-Pancreatic Surgery, Kyorin University Hospital, Japan
3. Department of Gastroenterology and Hepatology, Kyorin University School of Medicine, Japan
4. Department of Radiology, Kyorin University Faculty of Medicine, Japan
5. Tokyo Rosai Hospital, Japan
6. Department of Pathology, Kyorin University Faculty of Medicine, Japan