1. Division of Medical Microbiology, University of Cape Town, Cape Town, South Africa, Division of Tuberculosis Elimination, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
2. Centre for Infectious Disease Research, University of Cape Town, Cape Town, South Africa
3. College of Global Public Health, New York University, New York, New York, USA
4. Division of Medical Microbiology, University of Cape Town, Cape Town, South Africa, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa