[Yang, Luoyan; Lu, Xinsheng; Qiu, Weibin; Han, Hu] Cent S Univ, Dept Urol, Xiangya Hosp 2, Changsha 410011, Hunan, Peoples R China.
[Wang, Yi; Chen, Xian] Cent S Univ, Dept Urol, Affiliated Hosp 2, Changsha 410011, Hunan, Peoples R China.
[Luo, Hongmei] Univ S China, Dept Histol & Embryol, Hengyang 421001, Hunan, Peoples R China.
[Yang, Luoyan] Cent S Univ, Dept Urol, Xiangya Hosp 2, 139 Renmin Zhong Rd, Changsha 410011, Hunan, Peoples R China.