1 Key Laboratory of Transplant Engineering and Immunology of The Ministry of Health, Regenerative Medicine Research Centre, West China Hospital, Sichuan University, Chengdu 610041, China.
2 Key Laboratory of Transplant Engineering and Immunology of The Ministry of Health, Regenerative Medicine Research Centre, West China Hospital, Sichuan University, Chengdu 610041, China; Chinese Cochrane Centre, Chinese Evidence-Based Medicine Centre, West China Hospital, Sichuan University, Chengdu 610041, China. Electronic address: yzmylab@hotmail.com.
3 Key Laboratory of Transplant Engineering and Immunology of The Ministry of Health, Regenerative Medicine Research Centre, West China Hospital, Sichuan University, Chengdu 610041, China. Electronic address: feng31@sohu.com.