1. Division of Hepato-Biliary-Pancreatic Surgery and Transplantation, Department of Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
2. Laboratory of Biomaterials, Department of Regeneration Science and Engineering, Institute for Frontier Life and Medical Sciences, Kyoto University, Kyoto, Japan.
3. Department of Surgery, Nagahama City Hospital, Nagahama, Japan.
4. Clinical Bioresource Center, Kyoto University Hospital, Kyoto, Japan.
5. Department of Medical Life Systems, Faculty of Life and Medical Sciences, Doshisha University, Kyotanabe, Japan.
6. Shiga University of Medical Science, Otsu, Japan.