1. Department of Gynecology and Obstetrics, West China Second University Hospital, Sichuan University, Chengdu, China
2. Department of urology, Chengdu Second People’s Hospital, Chengdu, China
3. Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, West China Second Hospital, Sichuan University, Chengdu, China