1. Department of Urology, the Third Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510630, China
2. Department of Pharmacology, Uniformed Services University of the Health Sciences, Bethesda MD20814, USA
3. Department of Urology, the First Affiliated Hospital of Nan Chang University, Nanchang 330006, China
4. Department of Pathology, the Third Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510630, China