1. Centre for Health Informatics, Computing, and Statistics, Lancaster Medical School, Lancaster University, Lancaster, UK
2. Population Health Unit, KEMRI-Wellcome Trust Research Programme, Nairobi, Kenya
3. Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
4. GeoHealth Group, Institute of Global Health, University of Geneva, Geneva, Switzerland
5. Institute for Environmental Sciences, University of Geneva, Geneva, Switzerland