[1] Cent South Univ, Xiangya Hosp, Natl Clin Res Ctr Geriatr Disorders, Changsha, Hunan, Peoples R China
[2] Cent South Univ, Xiangya Hosp, Dept Spine Surg & Orthopaed, Changsha, Hunan, Peoples R China
[3] Cent South Univ, Xiangya Hosp 3, Dept Gen Surg, Changsha, Hunan, Peoples R China
[4] Cent South Univ, Xiangya Hosp, Dept Spine Surg & Orthoped, Xiangya Rd, Changsha 410008, Hunan, Peoples R China