[1] Capital Med Univ, Beijing Ji Shui Tan Hosp, Dept Orthoped Surg, Beijing, Peoples R China
[2] Wuhan Univ, Wuhan Hosp 3, Tongren Hosp, Dept Orthoped Surg, Wuhan, Hubei, Peoples R China
[3] Second Peoples Hosp Changzhi, Dept Orthoped Surg, Changzhi, Shanxi, Peoples R China
[4] North China Univ Sci & Technol, Sch Publ Hlth, Tangshan, Hebei, Peoples R China
[5] Beijing Res Inst Traumatol & Orthopaed, Beijing, Peoples R China