1. Independent Research Consultant, International Food Policy Research Institute (IFPRI), Washington, District of Colombia and Cornell University, Ithaca, New York;
2. International Food Policy Research Institute (IFPRI), Washington, District of Columbia;
3. Agence de Formation, de Recherche et d’Expertise en Santé pour l’Afrique (AFRICSante), Bobo-Dioulasso, Burkina Faso