1 Department of Adult Joint Reconstructive Surgery, Beijing Jishuitan Hospital, Fourth Clinical College of Peking University, Jishuitan Orthopaedic College of Tsinghua University, 31 East Xinjiekou Street, Beijing 100035, China; Department of Immunology, School of Basic Medical Sciences, Peking University, NHC Key Laboratory of Medical Immunology (Peking University), Beijing, China.
2 Department of Adult Joint Reconstructive Surgery, Beijing Jishuitan Hospital, Fourth Clinical College of Peking University, Jishuitan Orthopaedic College of Tsinghua University, 31 East Xinjiekou Street, Beijing 100035, China.
3 Department of Adult Joint Reconstructive Surgery, Beijing Jishuitan Hospital, Fourth Clinical College of Peking University, Jishuitan Orthopaedic College of Tsinghua University, 31 East Xinjiekou Street, Beijing 100035, China. Electronic address: orthoyixin@yahoo.com.
4 Department of Immunology, School of Basic Medical Sciences, Peking University, NHC Key Laboratory of Medical Immunology (Peking University), Beijing, China. Electronic address: famous@bjmu.edu.cn.