1 Division of Pulmonology, Department of Medicine, Tygerberg Hospital, Stellenbosch University, Cape Town, South Africa. Electronic address: brianallwood@gmail.com.
2 Desmond Tutu TB Centre, Stellenbosch University, Cape Town, South Africa; Department of Paediatrics, Stellenbosch University, Cape Town, South Africa.
3 TB Proof Advocacy Organisation, South Africa.
4 Liverpool School of Tropical Medicine, Liverpool, UK.