1. Department of Urology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China.
2. Department of Urology, Guangzhou Eighth People’s Hospital, Guangzhou Medical University, Guangzhou, Guangdong, China.
3. Department of Urology, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, China.
4. Department of Andrology, The Third Affiliated Hospital of Guangdong Medical University, Foshan, Guangdong, China.