1. Health Policy and Systems Division, School of Public Health and Family Medicine, University of Cape Town, Anzio Road, Observatory, South Africa
2. Department of Global Health and Development, London School of Hygiene and Tropical Medicine, Keppel Street, London, UK
3. Division of Research and Development, Dodowa Health Research Centre, Box DD1, Dodowa, Ghana
4. Department of Health Policy, Planning and Management, School of Public Health, University of Ghana, Legon, Accra, Ghana