[1] West China Second Hospital,Department of Obstetrics and Gynecology
[2] Key Laboratory of Birth Defects and Related Diseases of Women and Children,Department of Obstetrics and Gynecology
[3] Sichuan University,undefined
[4] Ministry of Education,undefined
[5] West China Second University Hospital,undefined
[6] Key Laboratory of Birth Defects and Related Diseases of Women and Children,undefined
[7] Sichuan University,undefined
[8] Ministry of Education,undefined