1 Department of Urology, Minimally Invasive Surgery Center, Guangdong Key Laboratory of Urology, The First Affliated Hospital of Guangzhou Medical University, Kangda Road 1#, Haizhu District, Guangzhou, 510230, Guangdong, China.
2 Department of Urology, Afliated Cancer Hospital and Institute of Guangzhou Medical University, Guangzhou, China.
3 Department of Family Medicine, Yunshan Medical Hospital, Shenzhen, China.
4 Department of Urology, Minimally Invasive Surgery Center, Guangdong Key Laboratory of Urology, The First Affliated Hospital of Guangzhou Medical University, Kangda Road 1#, Haizhu District, Guangzhou, 510230, Guangdong, China. gzgyzgh@vip.tom.com.