1. 1Global Health Leadership Initiative, Yale School of Public Health, New Haven, Connecticut;
2. 2Department of Chronic Disease Epidemiology, Yale School of Public Health, New Haven, Connecticut;
3. 3School of Public Health, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa;
4. 4School of Social Sciences, Monash University, Melbourne, Australia;
5. 5The Aurum Institute, Johannesburg, South Africa;
6. 6Department of Health Policy and Management, Yale School of Public Health, New Haven, Connecticut