1. Department of Urology, The First Hospital of Jilin University, Changchun130021, P. R. China
2. Department of Urology, The Affiliated Hospital of Qingdao University, Qingdao266003, P.R. China
3. College of Chemistry, Northeast Normal University, Changchun130024, P.R. China
4. Laboratory for Tumor Immunology, The First Hospital of Jilin University, Changchun130061, P.R. China