1. Desmond Tutu TB Centre, Department of Paediatrics and Child Health, Faculty of Health Sciences, Stellenbosch University, Cape Town, South Africa
2. KidCru, Tygerberg Academic Hospital, Department of Paediatrics and Child Health, Faculty of Health Sciences, Stellenbosch University, Cape Town, South Africa
3. Department of Medical Microbiology, University of Cape Town, Cape Town, South Africa; and National Health Laboratory Service, Cape Town, South Africa
4. G25 Paediatric HIV/AIDS Services, Groote Schuur Hospital, Cape Town, South Africa