1. APHM, Neonatal Unit, Hospital University la Conception, 13005 Marseille, France
2. Regional Health Agency, Provence-Alpes-Côte d’Azur, 13005 Marseille, France
3. APHM, Public Health and Medical Information Department, EA 3279, CEReSS–Health Service Research and Quality of Life Centre, 13005 Marseille, France
4. Aix-Marseille Université, C2VN, INRAe, INSERM, 13005 Marseille, France