Institution: | 1. Department of Obstetrics and Maternal-Fetal Medicine, Necker Enfants Malades Hospital, AP-HP, Paris, France;2. Department of Biochemistry, Necker Enfants Malades Hospital, AP-HP, Paris, France;3. Department of Prenatal Biochemistry, Robert Debré Hospital, AP-HP, Paris, France;4. Department of Virology, Necker Enfants Malades Hospital, AP-HP, Paris, France |