1. Department of Mathematics, University of Exeter, Exeter, EX4 4QF, U.K.
2. Department of Mathematical Sciences, University of Bath, Bath, BA2 7AY, U.K.
3. Department of Epidemiology and Public Health, Swiss Tropical and Public Health Institute, Basel, 4051, Switzerland
4. University of Basel, Basel, 4051, Switzerland
5. Department of Environmental Health, Harvard T. H. Chan School of Public Health, Boston, Massachusetts 02215, United States
6. Faculty of Civil and Environmental Engineering, The Technion, Haifa, 32000, Israel
7. Health Effects Institute, Boston, Massachusetts 02110, United States
8. Institute for Health Metrics and Evaluation, Seattle, Washington 98121, United States
9. World Health Organization, Geneva, 1202, Switzerland
10. Department of Environmental Health, Emory University, Rollins School of Public Health, Atlanta, Georgia 30322, United States
11. Department of Physics and Atmospheric Science, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada
12. Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138, United States
13. Department of Statistical Sciences, University of Toronto, Toronto, Ontario M5S 3G3, Canada
14. School of Population and Public Health, The University of British Columbia, Vancouver, British Columbia V6T 1Z3, Canada