1. Epidemiology and Demography Department, Kenya Medical Research Institute–Wellcome Trust Research Programme, Kilifi, Kenya
2. Department of Biomedical Sciences, Pwani University, Kilifi, Kenya
3. Department of Global Health and Development, London School of Hygiene and Tropical Medicine, London, United Kingdom
4. Public Health England, Salisbury, United Kingdom
5. School of Life Sciences and WIDER, University of Warwick, Coventry, United Kingdom