1. Health Systems Research Unit, South African Medical Research Council, Tygerberg
2. Drug-resistant TB Unit, King Dinuzulu Hospital, KwaZulu-Natal Department of Health, Durban, South Africa
3. McGill International TB Centre, McGill University, Montreal, Quebec, Canada
4. Faculty of Medicine and Health Sciences, Stellenbosch University, Tygerberg, South Africa
5. Marie Bashir Institute for Infectious Diseases and Biosecurity and the Children's Hospital at Westmead, University of Sydney, Sydney, New South Wales, Australia