1. SAMRC/Wits Centre for Health Economics and Decision Science—PRICELESS SA, School of Public Health, Faculty of Health Sciences, University of Witwatersrand, Johannesburg, South Africa
2. School of Economics and Finance, University of the Witwatersrand, Johannesburg, South Africa
3. School of Health Sciences, Faculty of Environmental and Life Sciences, University of Southampton, Southampton, UK
4. MRC Lifecourse Epidemiology Centre, Faculty of Medicine, University of Southampton, UK
5. School of Public Health, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa