1. Division of Global AIDS and TB, U.S. Centers for Disease Control and Prevention, Harare, Zimbabwe.
2. ICAP at Columbia University, Harare, Zimbabwe.
3. Centers for Disease Control and Prevention, Harare, Zimbabwe.
4. Division of Global HIV and TB, Center for Global Health, Centers for Disease Control and Prevention, Atlanta, Georgia, USA.
5. International Lab Branch, Division of Global HIV and TB, Center for Global Health, Centers for Disease Control and Prevention, Atlanta, Georgia, USA.
6. ICAP at Columbia University, New York, New York, USA.
7. AIDS and TB Unit, Ministry of Health and Child Care, Harare, Zimbabwe.
8. Biomedical Research and Training Institute, Harare, Zimbabwe.