1. Division of Development of Advanced Therapy, Center for Development of Advanced Medical Technology, Jichi Medical University, Shimotsukeshi, Tochigi, Japan
2. Department of Surgery, Jichi Medical University, Shimotsukeshi, Tochigi, Japan
3. Division of Hepato-Pancreato-Biliary Surgery and Transplantation, Department of Surgery, Kyoto University Graduate School of Medicine, Syougoin, Sakyoku, Kyotoshi, Kyoto, Japan