1. Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
2. The State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University School of Mechanical Engineering, Shanghai, China
3. Department of Orthopaedic Surgery, Sheba Medical Center, Tel Hashomer, Israel
4. Department of Orthopedic Surgery, Hospital of University of Pennsylvania, Philadelphia, Pennsylvania