1. Department of Orthopedics, The Second Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi, P.R. China
2. Jiangxi Key Laboratory of Intervertebral Disc Disease, Nanchang University, Nanchang 330006, Jiangxi, P.R. China
3. Institute of Minimally Invasive Orthopedics, Nanchang University, Nanchang 330006, Jiangxi, P.R. China