[1] Nanjing Univ, Sch Med, Drum Tower Hosp, Nanjing 210008, Peoples R China
[2] Beijing Union Med Coll Hosp, Dept Orthopaed, Beijing, Peoples R China
[3] Sichuan Univ, Dept Orthopaed, W China Hosp, Chengdu 610064, Peoples R China
[4] Capital Med Univ, Dept Orthopaed, Chaoyang Hosp, Beijing, Peoples R China
[5] Fourth Mil Med Univ, Dept Orthopaed, Xijing Hosp, Xian 710032, Peoples R China
[6] Shanghai Jiao Tong Univ, Dept Orthopaed, Renji Hosp, Shanghai 200030, Peoples R China
[7] Cent S Univ, Dept Orthopaed, Xiangya Hosp, Changsha, Peoples R China
[8] Cent S Univ, Dept Orthopaed, Xiangya Hosp 2, Changsha, Peoples R China