1. Spine Center Xinhua Hospital Shanghai Jiaotong University School of Medicine Shanghai China
2. Department of Orthopaedics Fifth Affiliated Hospital Southern Medical University Guangzhou P.R. China
3. Department of Orthopedic Surgery First Affiliated Hospital Nanchang University Jiangxi P.R. China
4. Department of Stomatology Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine Shanghai P.R. China
5. Department of Pediatric Neurosurgery Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine Shanghai P.R. China
6. Department of Orthopedics Shanghai Tenth People's Hospital School of Medicine Tongji University Shanghai P.R. China