[Chen, Xi; Wang, Ai-Ping; Li, Yan-Bing; Zhou, Zi-Jia; Sun, Qin-Min; Zhou, Xiao-Bing; Tan, Jian-Guo; Liu, Fang] Univ South China, Dept Anat, 28 W Changsheng Rd, Hengyang City 421001, Hunan, Peoples R China.
[Wen, Chao-Lun] PLA, Hosp 169, Spinal Surg Dept, Hengyang City 421001, Hunan, Peoples R China.
[Yan, Zheng-Guang] PLA, Hosp 169, Dept Radiol, Hengyang City 421001, Hunan, Peoples R China.
[Cao, Qi] Univ South China, Affiliated Hosp 2, Spinal Surg Dept, Hengyang City 421001, Hunan, Peoples R China.