1. Department of Orthopaedics, The Third Affiliated Hospital of Soochow University, Changzhou, Jiangsu 213000, P.R. China
2. Institute of Bioinformatics and Medical Engineering, Jiangsu University of Technology, Changzhou, Jiangsu 213001, P.R. China
3. Department of Urology, The Third Affiliated Hospital of Soochow University, Changzhou, Jiangsu 213000, P.R. China