1. Section of Infectious Diseases Department of Medicine Boston Medical Center Boston Massachusetts USA
2. Department of Global Health Boston University School of Public Health Boston Massachusetts USA
3. Health Economics and Epidemiology Research Office Department of Internal Medicine School of Clinical Medicine Faculty of Health Sciences University of the Witwatersrand Johannesburg South Africa
4. Department of Epidemiology Boston University School of Public Health Boston Massachusetts USA
5. Clinton Health Access Initiative Lusaka Zambia
6. Ministry of Health Lusaka Zambia
7. The Centre for Infectious Disease Research in Zambia Lusaka Zambia
8. Department of Medical Microbiology Amsterdam University Medical Centre Amsterdam The Netherlands