1. First Department of Surgery, Graduate School of Medicine; Hokkaido University; Sapporo; Japan
2. Department of Transplant Surgery, Graduate School of Medicine; Hokkaido University; Sapporo; Japan
3. Division of Organ Transplantation; Hokkaido University Hospital; Sapporo; Japan
4. Development Research Laboratories; Kyowa Hakko Kirin Co., Ltd.; Shizuoka; Japan
5. Drug Discovery Research; Astellas Pharma, Inc.; Tsukuba; Japan