1. Department of Obstetrics and Gynecology, East HospitalTongji University School of Medicine Shanghai China
2. Department of Gynecology, HwaMei HospitalUniversity of Chinese Academy of Sciences Ningbo China
3. Ningbo Institute of Life and Health IndustryUniversity of Chinese Academy of Sciences Ningbo China
4. Department of Gynecology, Taierzhuang Hospital Zaozhuang China
5. University of Bristol Bristol UK
6. Department of PathologyShanghai First Maternity and Infant Hospital, Tongji University School of Medicine Shanghai China
7. Department of Obstetrics and GynecologyTongji Hospital, Tongji Medical College, Huazhong University of Science and Technology Wuhan China