1. Department of Obstetrics Affiliated Xiaoshan Hospital Hangzhou Normal University Hangzhou Zhejiang China
2. Department of Obstetrics and Gynecology Department of Fetal Medicine and Prenatal Diagnosis Key Laboratory for Major Obstetric Diseases of Guangdong Province The Third Affiliated Hospital of Guangzhou Medical University Guangzhou Guangdong China
3. Department of Gynecology Affiliated Xiaoshan Hospital Hangzhou Normal University Hangzhou Zhejiang China
4. BGI Guangzhou Medical Institute Company Limited Guangzhou Guangdong China