1. Health Economics Unit, School of Public Health and Family Medicine, University of Cape Town, Cape Town, South Africa
2. Health Policy and Systems Division, School of Public Health and Family Medicine, University of Cape Town, Cape Town, South Africa
3. Department of Global Health and Development, London School of Hygiene and Tropical Medicine, United Kingdom
4. Health Alliance International, Beira, Mozambique
5. Department of Global Health, University of Washington, Seattle, WA, USA
6. Health Alliance International, Seattle, WA, USA