1. Department of Orthopaedic Surgery, the Third Hospital of Hebei Medical University, Shijiazhuang, P R China
2. Key Laboratory of Orthopaedic Biomechanics of Hebei Province, Shijiazhuang, P R China
3. Orthopaedic Research Institution of Hebei Province, Hebei, P R China
4. Department of Pharmacy, the Second Hospital of Hebei Medical University, Shijiazhuang, P R China
5. Chinese Academy of Engineering, Beijing, P.R. China