1. Health Management Department West China Hospital of Sichuan University Chengdu China
2. Obstetrics and Gynecology DepartmentWest China Second University Hospital, Sichuan University Chengdu China
3. Department of Radiation OncologySichuan Cancer Hospital and Institute, Sichuan Cancer Center Chengdu China
4. Obstetrics and Gynecology Department Sichuan People’s Hospital Chengdu China