1. Division of Hepato‐Biliary‐Pancreatic Surgery and Transplantation, Department of Surgery Graduate School of Medicine Kyoto University Kyoto Japan
2. Department of Gastroenterological Surgery and Oncology Tazuke Kofukai Medical Research Institute, Kitano Hospital Osaka Japan
3. Department of Surgery, Kyoto Katsura Hospital Kyoto Japan
4. Department of Clinical Laboratory Kyoto University Hospital Kyoto Japan
5. Department of Clinical Laboratory Medicine Kyoto University Graduate School of Medicine Kyoto Japan
6. Bioscience Division, TOSOH Corporation Kanagawa Japan