1. Department of Health Policy, Planning and Management, University of Ghana School of Public Health, Legon-Accra, Ghana
2. Division of Health Policy and Systems, School of Public Health and Family Medicine, University of Cape Town, Cape Town, South Africa
3. Department of Biostatistics, University of Ghana School of Public Health, Legon-Accra, Ghana
4. Department of Global Health and Development, London School of Hygiene and Tropical Medicine, London, UK