1. Department of Urology, Nanjing Drum Tower Hospital, Medical School of Nanjing University, Nanjing University, Nanjing, Jiangsu 210008, P.R. China
2. Department of Urology, Drum Tower Clinical Medical School of Nanjing Medical University, Nanjing University, Nanjing, Jiangsu 210008, P.R. China
3. Department of Clinical Laboratory, Jinling Hospital, Nanjing University School of Medicine, Nanjing University, Nanjing, Jiangsu 210008, P.R. China