1 Department of Orthopaedics, The Second Xiangya Hospital of Central South University, No. 139 Remin Road, Changsha, 410011, Hunan Province, China.
2 Department of Orthopaedics, The Second Xiangya Hospital of Central South University, No. 139 Remin Road, Changsha, 410011, Hunan Province, China. xiaotaoxyl@163.com.