1. Research for Development International, Opposite Fokou Mendong, Yaoundé 30 883, Cameroon
2. University of Montreal Public Health Research Institute, 7101 Avenue du Parc, Room 3060, Montreal, QC H3N 1X9, Canada
3. Social and Preventive Medicine, School of Public Health, University of Montreal, 7101 Avenue du Parc, Montreal, QC H3N 1X9, Canada
4. Medical Faculty and University Hospital, Heidelberg Institute of Global Health, Heidelberg University, INF 130.3, Heidelberg 69120, Germany
5. World Bank, Office of Yaoundé, Nouvelle Route Bastos, Yaoundé 1128, Cameroon
6. Cellule Technique Nationale FBP, Tsinga, Yaoundé 237, Cameroon
7. IRD (French Institute for Research on Sustainable Development), CEPED (IRD-Université Paris Descartes), Universités Paris Sorbonne Cités, ERL INSERM SAGESUD, 45 rue des Saints Pères, Paris 75006, France