1. Department of Gastroenterology and Hepatology, Nagasaki University, Nagasaki City, Nagasaki, Japan
2. Department of Surgery, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki City, Nagasaki, Japan
3. Department of Gastroenterological and Transplant Surgery, Applied Life Sciences, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima City, Hiroshima, Japan
4. Department of Transplantation and Pediatric, Surgery, Kumamoto University, Kumamoto City, Kumamoto, Japan
5. Department of Surgery, Graduate School of Medicine, Kyoto University, Kyoto City, Kyoto, Japan
6. Hepato-Biliary-Pancreatic Surgery Division and Artificial Organ and Transplantation Division, Department of Surgery, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
7. Department of Gastroenterology and Hepatology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki City, Nagasaki, Japan