1. Department of Obstetrics, Gynecology and Fetal Medicine, University Hospital of Tours, 2 Boulevard Tonnellé, Tours Cedex 9, France;
2. Department of Medicine, University François Rabelais, Tours, France;
3. Department of Biochemistry, University Hospital Tours, Tours, France;
4. INSERM CIC 1415, University Hospital Tours, Tours, France;
5. Maternité Notre Dame de Bon Secours, Groupe Hospitalier Saint Joseph, Paris, France;
6. Department of Obstetrics, University Hospital of Nantes, Nantes, France;
7. Department of Obstetrics, University Hospital of Poitiers, Poitiers, France