1. Department of Social and Preventive Medicine, School of Public Health, University of Montreal, Montreal, Quebec, Canada
2. Société d’Études et de Recherches en Santé Publique, Ouagadougou, Burkina Faso
3. Sciences de la Vie et de la Santé, University Aix-Marseille, Marseille, France
4. Centre de recherche en santé publique, Montreal, Quebec, Canada
5. Department of Tropical Medicine, Tulane University School of Public Health and Tropical Medicine, New Orleans, Louisiana, USA