1. First Central Clinical College, Tianjin Medical University, Tianjin, P. R. China
2. Department of Transplantation, Tianjin First Central Hospital, Tianjin, P. R. China
3. Tianjin Key Laboratory of Organ Transplantation, Tianjin, P. R. China
4. Laboratory of Immunology and Inflammation, Tianjin Medical University, Tianjin, P. R. China
5. Beijing Friendship Hospital, China Capital Medical University, Beijing, P. R. China