1. Department of Radiology, Hospital of Obstetrics and Gynecology, Fudan University, Shanghai 200090, China
2. Laboratory for Reproductive Immunology, Hospital of Obstetrics and Gynecology, Shanghai Medical School, Fudan University, Shanghai 200090, China
3. Department of Pathology, Hospital of Obstetrics and Gynecology, Fudan University, Shanghai 200090, China
4. Philips Healthcare, Shanghai 200070, China
5. Institute of Obstetrics and Gynecology, Hospital of Obstetrics and Gynecology, Fudan University, Shanghai 200090, China.