2 AP-HP, Department of Obstetrics and Fetal Medicine, Hospital Necker-E.M., Paris, France.
3 AP-HP, Department of Histology, Embryology and Cytogenetics, Hospital Necker-E.M, Paris, France.
4 Institut National de la Santé et de la Recherche Médicale (INSERM), U1151, CNRS UMR 8253, Hospital Necker-E.M., Department of Growth and Signaling, Université de Paris, Paris, France.
5 AP-HP, Virology Laboratory, Hospital Necker-E.M, Paris, France.