1. Shanghai Key Laboratory of Orthopaedic Implants, Department of Orthopaedic Surgery, Shanghai Ninth People’s Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, People’s Republic of China
2. Department of Neurology, Huashan Hospital, Fudan University, Shanghai, China
3. Department of Orthopedic Surgery, The Third Affiliated Hospital of Naval Medical University, Shanghai, China
4. Department of Orthopedics, Changhai Hospital, Naval Medical University, Shanghai, P.R. China