1. Department of Gynecology, Obstetrics and Gynecology Hospital of Fudan University, Shanghai, China.
2. Department of Gynecology, West China Second University Hospital of Sichuan University, Chengdu, China.
3. Department of Gynecology, Sichuan Cancer Hospital, Chengdu, China.
4. Department of Gynecology, Ruijin Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, China.
5. Department of Gynecology, The International Peace Maternity & Child Health Hospital (IPMCH) of China Welfare Institute (CWI), Shanghai, China.
6. Department of Gynecology, The Sixth Hospital of Shanghai Jiaotong University School of Medicine, Shanghai, China.
7. Department of Gynecology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University of Medicine, Shanghai, China.
8. Department of Gynecology, First Maternity and Infant Hospital affiliated to Tongji University, Shanghai, China.