1. Imaging Department of Tongji Hospital, Medical School of Tongji University, Shanghai 200065, P.R. China
2. Department of Urology, Huashan Hospital, Fudan University, Shanghai 200040, P.R. China
3. Department of Urology, Shandong Province affiliated Hospital, Shandong University, Jinan, Shandong 250021, P.R. China
4. Department of Human Anatomy, Medical School of Nantong University, Nantong, Jiangsu 226001, P.R. China
5. Department of Orthopedic Surgery, Shanghai General Hospital, Shanghai Jiaotong University, Shanghai 200080, P.R. China