1. Department of Orthopaedics, Shanghai University of Medicine and Health Sciences Affiliated Zhoupu Hospital, Shanghai 201318, P.R. China
2. Department of Orthopaedics, Jinan Zhangqiu District Hospital of TCM, Jinan, Shandong 250200, P.R. China
3. Department of Orthopaedics, Zibo Zhoucun People's Hospital, Zibo, Shandong 255300, P.R. China