1. Centre for Lung Infection and Immunity, University of Cape Town Lung Institute, Cape Town, South Africa
2. South African Medical Research Council/University of Cape Town Centre for the Study of Antimicrobial Resistance, Cape Town, South Africa
3. Department of Integrative Biomedical Sciences, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa
4. Baylor Institute for Immunology Research, Dallas, Texas; and
5. Faculty of Infectious and Tropical Diseases, Department of Immunology and Infection, London School of Hygiene and Tropical Medicine, London, United Kingdom