1. Department of Endocrinology, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei 050051, P.R. China
2. Department of Spinal Surgery, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei 050051, P.R. China
3. Department of Obstetrics and Gynecology, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei 050051, P.R. China
4. Department of Endocrinology, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei 050051, P.R. China
5. Department of Spinal Surgery, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei 050051, P.R. China
6. National Health Commission Key Laboratory of Intelligent Orthopaedic Equipment, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei 050051, P.R. China