1. Anthropology Department, George Washington University, Washington, DC, USA
2. Center for Innovation in Global Health, Georgetown University & College of Medicine, Johannesburg, South Africa
3. Faculty of Health Sciences, University of Malawi and SAMRC Developmental Pathways for Health Research Unit, University of the Witwatersrand, Johannesburg, South Africa
4. Edmund A. Walsh School of Foreign Service, Georgetown University and SAMRC Developmental Pathways for Health Research Unit, Johannesburg, South Africa
5. Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa