1. Department of Urology, Peking University Shenzhen Hospital, Shenzhen, Guangdong 518036, P.R. China
2. The Guangdong and Shenzhen Key Laboratory of Male Reproductive Medicine and Genetics, Peking University Shenzhen Hospital, Institute of Urology of Shenzhen PKU-HKUST Medical Center, Shenzhen, Guangdong 518036, P.R. China
3. Department of Ultrasound, Peking University Shenzhen Hospital, Shenzhen, Guangdong 518036, P.R. China