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Contributors JRH conceived the paper and wrote the first draft. CD extracted data from DHS reports and contributed to the writing. RGW did the mathematical modelling work for the paper.
Funding JH was supported by STRIVE, a Research Programme Consortium funded by UKaid from the Department for International Development. STRIVE is a collaboration dedicated to tackling the structural drivers of HIV. RGW is funded by a Medical Research Council (UK) Methodology Research Fellowship (G0802414), the Consortium to Respond Effectively to the AIDS/TB Epidemic (19790.01), and the Bill and Melinda Gates Foundation (21675).
Competing interests None.
Provenance and peer review Not commissioned; externally peer reviewed.
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