1. Laboratory for Reproductive Immunology, Hospital of Obstetrics and Gynecology, Fudan University, Shanghai 200011, P.R. China
2. Department of Obstetrics and Gynecology, The Affiliated Hospital of Jiangnan University, Wuxi, Jiangsu 214062, P.R. China
3. Medical Center of Diagnosis and Treatment for Cervical Diseases, Hospital of Obstetrics and Gynecology, Fudan University, Shanghai 200011, P.R. China