1. Department of Urology, Sheng Jing Hospital of China Medical University, Shenyang, Liaoning 110004, P.R. China
2. Department of Surgery, People's Hospital of Nong An Country, Changchun, Jilin 130200, P.R. China
3. Department of Orthopedics, Chengde Affiliated Hospital of Chengde Medical College, Chengde, Hebei 067000, P.R. China
4. Department of Biochemistry and Molecular Biology, School of Life Sciences, China Medical University, Shenyang, Liaoning 110122, P.R. China