1. School of Rehabilitation Medicine, Weifang Medical University, Shandong 261041, China
2. Southwest JiaoTong University College of Medicine, No. 111 North first Section of Second Ring Road, Chengdu 610036, China
3. Shanghai Key Laboratory of Orthopaedic Implant, Department of Orthopaedic Surgery, Shanghai Ninth People’s Hospital Affiliated Shanghai Jiao Tong University School of Medicine, 639 Zhizaoju Road, Shanghai 200011, China
4. Department of Spinal Surgery, The Affiliated Hospital of Qingdao University, No. 59 Haier Road, Qingdao 266000, Shandong Province, China
5. Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, P. R. China
6. Med-X Research Institute, School of Biomedical Engineering, Shanghai Jiao Tong University, 1954 Huashan Road, Shanghai 200030, China