Kerry Ann Brown1, Francesca Harris2, Christina Potter3, Cécile Knai4. 1. Faculty of Public Health and Policy, London School of Hygiene & Tropical Medicine, London WC1H 9SH, UK. Electronic address: kerry.brown@lshtm.ac.uk. 2. Department of Population Health, London School of Hygiene & Tropical Medicine, London WC1H 9SH, UK; Centre on Climate Change and Planetary Health, London School of Hygiene & Tropical Medicine, London WC1H 9SH, UK. 3. Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford, UK. 4. Faculty of Public Health and Policy, London School of Hygiene & Tropical Medicine, London WC1H 9SH, UK.