1. Rustenburg Research Centre, The Aurum Institute, Rustenburg, South Africa
2. Department of Interdisciplinary Social Science, Public Health, Utrecht University, Utrecht, The Netherlands
3. School of Pathology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
4. Health Economics and Epidemiology Research Office, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
5. Department of Environmental Health Sciences, Yale School of Public Health, New Haven, CT, USA
6. School of Health Sciences, College of Health Sciences, University of KwaZulu-Natal, Durban, South Africa
7. Department of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco, CA, USA
8. IAVI, New York, NY, USA
9. School of Medicine, College of Health Sciences, University of Nairobi, Nairobi, Kenya