1. Division of Tuberculosis Elimination, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
2. South African Tuberculosis Vaccine Initiative, Cape Town, South Africa
3. Institute of Infectious Disease and Molecular Medicine, Cape Town, South Africa
4. Division of Immunology, Department of Pathology, University of Cape Town, Cape Town, South Africa