Affiliation: | Department of Primary Care and Population Sciences, Royal Free and University College London Schools of Medicine, London NW3 2PF ;Department of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London WC1E 7HT ;Benfield Greig Hazard Research Centre, Department of Space and Climate Physics, University College London, Holmbury St Mary, Dorking, Surrey RH5 6NT |