1. Department of Surgery, Doctoral Program in Clinical Science, Graduate School of Comprehensive Human Sciences; University of Tsukuba; Ibaraki Japan
2. Institute of Clinical Medicine, Graduate School of Comprehensive Human Sciences; University of Tsukuba; Ibaraki Japan
3. Division of Organ Transplantation; Tohoku University Hospital; Miyagi Japan
4. Nephrology Center; Toranomon Hospital; Tokyo Japan
5. Department of Gastroenterology and Hepatology; Kinki University School of Medicine; Osaka Japan