1. Department of Urology, The First Affiliated Hospital, Chongqing Medical University, Chongqing 400016, P.R. China
2. Key Laboratory of Laboratory Medical Diagnostics, Ministry of Education, Department of Laboratory Medicine, Chongqing Medical University, Chongqing 400016, P.R. China
3. Department of Urology, Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan 637000, P.R. China