1. Centers for Disease Control and Prevention (CDC), Gaborone, Botswana, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa, Faculty of Medicine, University of Botswana, Gaborone, Botswana
2. Centers for Disease Control and Prevention (CDC), Gaborone, Botswana, Division of Tuberculosis Elimination
3. Division of Global HIV and Tuberculosis, CDC, Atlanta, Georgia, USA
4. Centers for Disease Control and Prevention (CDC), Gaborone, Botswana
5. Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa, Aurum Institute, Johannesburg, South Africa