1. Policy Planning Monitoring and Evaluation Division, Ghana Health Service, Private Mail Bag, Accra, Ghana
2. Heilbrunn Department of Population and Family Health, Mailman School of Public Health, Columbia University
3. Institute of Global Health and Development, Queen Margaret University, Edinburgh, Scotland EH21 6UU, UK
4. United States Agency for International Development METSS Project, 10 Wuogon Cl, Accra, Ghana
5. Department of Sociomedical Science, Mailman School of Public Health, Columbia University