1. Department of Urology, Peking University First Hospital, Beijing, P.R. China
2. Institute of Urology, Peking University, Beijing, P.R. China
3. National Urological Cancer Center, Beijing, P.R. China
4. Department of Urology, Fudan University Shanghai Cancer Center, Shanghai, P.R. China
5. Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, P.R. China