1. Department III of Orthopaedics, Jinan Municipal Hospital of Traditional Chinese Medicine, Jinan, Shandong 250000, P.R. China
2. Department of Spine Surgery, Jinan Zhangqiu District Hospital of Traditional Chinese Medicine,Jinan, Shandong 250000, P.R. China
3. Department of Hand, Foot and Ankle Surgery, Jining No.�1 People's Hospital, Jining, Shandong 272011, P.R. China