Affiliation: | 1. Departments of Anatomy, University of South China, Hengyang City, Hunan Province, PRC;2. Spinal Surgery Department, The 169th hospital of P.L.A, Hengyang City, Hunan Province, PRC;3. Radiology Department, The 169th hospital of P.L.A, Hengyang City, Hunan Province, PRC;4. Spinal Surgery Department, The second affiliated hospital of university of south china, Hengyang City, Hunan Province, PRC |