1. The Health Economic Unit of the University Hospital of Toulouse Toulouse France
2. UMR1295 CERPOP, Team EQUITY Toulouse III University Toulouse France
3. University of Toulouse III Toulouse France
4. University Hospitals of Strasbourg Strasbourg France
5. Department of Obstetrics and Gynecology Centre Hospitalier Princesse Grace Monaco France
6. UMR1295 CERPOP, Team SPHERE Toulouse III University Toulouse France
7. Department of Obstetrics and Gynecology Paule de Viguier HospitalCHU Toulouse Toulouse France