1. Department of Orthopaedics, No. 903 Hospital of PLA Joint Logistic Support Force, Hangzhou, 310000, Zhejiang Province, China
2. Department of Spine, Qinghai University Affiliated Hospital, Xining, 810000, Qinghai Province, China
3. Department Anesthesiology, Zaozhuang Municipal Hospital, Zaozhuang, 277100, Shandong Province, China
4. Department of Orthopaedics, The Third Affiliated Hospital of Xinxiang Medical College, Xinxiang, 453000, Henan Province, China
5. Department of Neurosurgery, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing, 102218, China