1. Department of Medicine, University Teaching Hospital, Lusaka, Zambia
2. School of Medicine, University of Zambia, Lusaka, Zambia
3. School of Medicine, University of Maryland at Baltimore, Baltimore, Maryland
4. Zambia National Public Health Institute, Lusaka, Zambia
5. University Teaching Hospital HIV AIDS Programme, Lusaka, Zambia
6. Department of Medicine, University of California at San Francisco, San Francisco, California
7. Johns Hopkins University, Baltimore, Maryland
8. Center for Global Health and Quality, Georgetown University School of Medicine, Washington, District of Columbia
9. Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama
10. Centre for Infectious Disease Research in Zambia, Lusaka, Zambia
11. School of Public Health, University of Alabama at Birmingham, Birmingham, Alabama