1. Department of Obstetrics and Gynecology, Ren Ji Hospital, School of Medicine Shanghai Jiao Tong University Shanghai China
2. Shanghai Key Laboratory of Gynecologic Oncology Shanghai China
3. International Peace Maternity and Child Health Hospital, School of Medicine Shanghai Jiao Tong University Shanghai China
4. Department of Obstetrics and Gynecology Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine Shanghai China
5. Department of Obstetrics and Gynecology Renmin Hospital of Wuhan University Wuhan China