1. Department of Andrology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510000, China
2. Reproductive Medicine Research Center, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou 510000, China
3. Guangdong Provincial Key Laboratory of Orthopedics and Traumatology, Guangzhou 510000, China
4. Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, Guangzhou 510000, China