1. Department of International Health, Johns Hopkins Bloomberg School of Publish Health, Baltimore, Maryland.
2. Department of Health, Behavior and Society, Johns Hopkins Bloomberg School of Publish Health, Baltimore, Maryland.
3. Department of Epidemiology, Johns Hopkins Bloomberg School of Publish Health, Baltimore, Maryland.
4. Department of Medicine, Division of Clinical Pharmacology, University of Cape Town, Cape Town, South Africa.
5. Center of Tuberculosis Research, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland.
6. University of Cape Town's Lung Institute, Cape Town, South Africa.
7. School of Public Health and Family Medicine, University of Cape Town, Cape Town, South Africa.