1. Center of Reproductive Medicine, The Sixth Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China.
2. Department of Gynecology and The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China.
3. Department of Obstetrics and Gynecology, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China.
4. Reproductive Medicine Center, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China.
5. Department of Urology, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China.