1. South African Tuberculosis Vaccine Initiative, Institute of Infectious Disease and Molecular Medicine, and Division of Immunology, Department of Pathology, University of Cape Town, Cape Town, South Africa
2. Aeras, Rockville, Maryland, USA
3. Department of Social and Behavioral Sciences, School of Public Health and Family Medicine, University of Cape Town, Cape Town
4. Department of Health, Western Cape and Division of Community Health, Stellenbosch University, Stellenbosch, South Africa
5. Jenner Institute, Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK