1. Research Assistant, Centre de Recherche en Reproduction Humaine et Démographie (CERRHUD), Cotonou, Bénin
2. Senior Researcher and Director, Centre de Recherche en Reproduction Humaine et Démographie (CERRHUD), Cotonou, Bénin
3. Senior Researcher, Centre de Recherche en Reproduction Humaine et Démographie (CERRHUD), Cotonou, Bénin
4. Professor, Department of Public Health, Institute of Tropical Medicine (ITM), Antwerp, Belgium
5. Senior Researcher, Department of Public Health, Institute of Tropical Medicine (ITM), Antwerp, Belgium