1. Department of Spinal Surgery, The Third Hospital of Hebei Medical University, Shijiazhuang, 050051, PR China
2. Department of Rehabilitation Medicine, The Third Hospital of Hebei Medical University, Shijiazhuang, 050051, PR China
3. Hebei Provincial Key Laboratory of Orthopaedic Biomechanics, Shijiazhuang, 050051, PR China