About the Authors
Southern Africa Medical Unit, Médecins Sans Frontières, Cape Town, South Africa
Ministry of Health and Child Welfare Zimbabwe, Buhera District, Zimbabwe
Centre for Infectious Disease Epidemiology and Research, University of Cape Town, Cape Town, South Africa
Clinical Research Unit, London School of Hygiene and Tropical Medicine, London, United Kingdom
Medical Unit, Médecins Sans Frontières, Harare, Zimbabwe
The authors have declared that no competing interests exist.
Conceived and designed the experiments: HB DM. Performed the statistical analysis: KK HB. Prepared the first draft of the manuscript: HB. Provided critical input to subsequent drafts of the manuscript: HB JM KN NF KK DM. Approved the final version of the manuscript: HB JM KN NF KK DM.