1. Obstetrics Center Jeanne de Flandre Hospital, CHRU Lille Lille France
2. Department of Biostatistics, EA2694 Public Health: Epidemiology and Quality of Care University of Lille, University Hospital Center (CHU) Lille Lille France
3. Obstetrics Center, EA 4489 – Perinatal Environment and Health Jeanne de Flandre Hospital, CHRU Lille, University Lille Lille France