1. Department of Pain and Rehabilitation, Xinqiao Hospital, Army Medical University, Chongqing 400037, P.R. China
2. Department of Orthopedic Surgery, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, P.R. China
3. Department of Pathology, Xinqiao Hospital, Army Military Medical University, Chongqing 400037, P.R. China