1. Department of Urology; The Fifth Affiliated Hospital of Guangzhou Medical University; Guangzhou 510700 China
2. Center for Cancer and Stem Cell Biology; Institute of Biosciences and Technology; Texas A&M Health Science Center; Houston Texas 77030
3. Department of Urology; Guangdong Key Laboratory of Clinical Molecular Medicine and Diagnostics; Guangzhou First People's Hospital; Guangzhou Medical University; Guangzhou 510180 China
4. Department of Urology; The Sun Yat-Sen Memorial Hospital; Sun Yat-Sen University; Guangzhou China