1. Department of Pathology, West China Hospital, Sichuan University, Chendu, P.R. China.
2. Key Laboratory of Transplant Engineering and Immunology, Institute of Clinical Pathology, West China Hospital, Sichuan University, Chengdu, P.R. China.
3. Experimental Animal Center, West China Hospital, Sichuan University, Chengdu, P.R. China.