1. Department of International Public Health, Liverpool School of Tropical Medicine, Liverpool, UK
2. LVCT Health, Nairobi, Kenya
3. Health Economics Research Unit, KEMRI-Wellcome Trust Research Programme, Nairobi, Kenya
4. Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
5. KEMRI Centre for Geographic Medicine Research—Coast, and Wellcome Trust Research Programme, Nairobi, Kenya
6. Centre for Tropical Medicine and Global Health, University of Oxford, Oxford, UK