[1] The Third Affiliated Hospital of Guangzhou Medical University,Department of Obstetrics and Gynecology
[2] Southern Medical University,Department of Obstetrics and Gynecology, Nanfang Hospital
[3] Key Laboratory for Major Obstetric Diseases of Guangdong Province,Department of Obstetrics and Gynecology
[4] Key Laboratory of Reproduction and Genetics of Guangdong Higher Education Institutes,Department of Obstetrics and Gynecology
[5] Guangzhou Huadu District Maternal and Child Health Hospital,Department of Obstetrics and Gynecology
[6] The Sixth Affiliated Hospital of Guangzhou Medical University,Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College
[7] Qingyuan People’s Hospital,Department of Obstetrics and Gynecology
[8] Northwest Women’s and Children’s Hospital,Department of Obstetrics and Gynecology
[9] Huazhong University of Science and Technology,Department of Obstetrics and Gynecology
[10] The First Affiliated Hospital of Zhengzhou University,Department of Obstetrics and Gynecology
[11] Peking University Third Hospital,Department of Obstetrics and Gynecology
[12] The First Affiliated Hospital of Xinjiang Medical University,Institute of Reproductive and Child Health, National Health Commission Key Laboratory of Reproductive Health
[13] The First Affiliated Hospital of Chongqing Medical University,undefined
[14] The Second Affiliated Hospital of Guangzhou Medical University,undefined
[15] Peking University Health Science Center,undefined