1. From the Clinical and Translational Research Center (X.C., J.Y., K.W.), Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, P.R. China.
2. Department of Pathology (Q.H.), Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, P.R. China.
3. Department of Obstetrics (M.L., T.D.), Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, P.R. China.