1 Kenya Medical Research Institute (KEMRI), Centre for Geographic Medicine Research-Coast, KEMRI-Wellcome Trust Research Programme, Kilifi 80108, Kenya.
2 Kenya Medical Research Institute (KEMRI), Centre for Geographic Medicine Research-Coast, KEMRI-Wellcome Trust Research Programme, Kilifi 80108, Kenya; Department of Paediatrics, University of Oxford, Oxford, UK. Electronic address: satkinson@kemri-wellcome.org.