1. Department of Urology, Clinical Medical College of Yangzhou University, Subei People's Hospital of Jiangsu Province, Yangzhou, Jiangsu 225001, P.R. China
2. Department of Urology, Dalian Medical University, Dalian, Liaoning 116044, P.R. China
3. Department of Oncology, Clinical Medical College of Yangzhou University, Subei People's Hospital of Jiangsu Province, Yangzhou, Jiangsu 225001, P.R. China