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 Public Health Faculty of Health Sciences, University of the Witwatersrand Johannesburg South Africa
3. Department of Health Policy London School of Economics London UK
4. MRC/Wits Rural Public Health and Health Transitions Research Unit—Agincourt School of Public Health, Faculty of Health Sciences, University of the Witwatersrand Johannesburg South Africa
5. Department of Bioethics National Institutes of Health Bethesda Maryland USA
6. New York Academy of Medicine New York City New York USA