1 French Institute for Demographic Studies (Ined), French Institute for Medical Research and Health (Inserm), French Blood Agency, ELFE Joint Unit, Paris, France.
2 French Institute for Medical Research and Health, UMR 1153 Centre for Research in Epidemiology and Statistics Paris University (CRESS), Team Early Life Research on Later Health, Villejuif, France.
3 French Institute for Demographic Studies, Fertility, Family and Sexuality Research Unit, Paris, France.
4 University Center for Research on Public Policy and Politics (CURAPP), University of Picardy, CNRS, Amiens, France.