1. Shi's Center of Orthopedics and Traumatology, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine (TCM), Institute of Traumatology and Orthopedics, Shanghai Academy of TCM, Shanghai 201203, P.R. China
2. Department of Orthopedics, The Second Hospital Shanxi Medical University, Taiyuan, Shanxi 030001, P.R. China
3. Tianjin Key Laboratory for Control Theory and Applications in Complicated Industry Systems, School of Mechanical Engineering, Tianjin University of Technology, Tianjin 300384, P.R. China
4. Department of Orthopedics, The Warren Alpert Medical School of Brown University and Rhode Island Hospital, Providence, RI 02903, USA