Funding
This work was cofunded by the UK Medical Research Council, Wellcome, and UK Aid through the Global Health Trials (grant reference MR/P006973/1). The funders had no role in the study design, execution, and analysis and decisions regarding publication. This research was also funded in part by the Wellcome Trust (grant reference 220211). For the purpose of Open Access, the author has applied a CC BY public copyright licence to any Author Accepted Manuscript version arising from this submission.TNW is funded through a Senior Research Fellowship from Wellcome (202800/Z/16/Z). KM and POO received funding from Wellcome East African Overseas Programme Award from the Wellcome Trust 203077/Z/16/Z.