1. Department of Paediatrics and Child Health, Desmond Tutu TB Centre, Stellenbosch University, Cape Town, Western Cape, South Africa; Department of Pediatrics, School of Medicine, Case Western Reserve University, Cleveland, Ohio, USA
2. Centre for Health Research, Geisinger Medical Centre, Danville, Pennsylvania, USA
3. Section of Microbiology and Immunology, The Gade Institute, University of Bergen and Haukeland University Hospital, Bergen, Norway
4. Department of Paediatrics and Child Health, Desmond Tutu TB Centre, Stellenbosch University, Cape Town, Western Cape, South Africa