[Zhang, Zheng-Liang; Dai, Zhi-Hui] Wenzhou Med Univ, Dept Orthoped, Affiliated Dongyang Hosp, Dongyang, Zhejiang, Peoples R China.
[Huang, Wei] Univ South China, Affiliated Hosp 1, Hlth Management Ctr, Hengyang, Hunan, Peoples R China.
[Lv, Guo-Hua; Li, Jing] Cent South Univ, Xiangya Hosp 2, Dept Spine Surg, Changsha, Hunan, Peoples R China.
[Zou, Ming-Xiang] Univ South China, Affiliated Hosp 1, Dept Spine Surg, Hengyang, Hunan, Peoples R China.