1. Meilleur Accès aux Soins de Santé (M.A. SANTE), Yaoundé, Cameroon.
2. Division of Health Operations Research, Ministry of Public Health, Yaoundé, Cameroon.
3. Department of Biomedical Sciences, University of Dschang, Dschang, Cameroon.
4. Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland.