1. Dalla Lana School of Public Health, Gage Occupational and Environmental Health Unit, University of Toronto, Toronto, Ontario, Canada
2. School of Environmental Health, University of British Columbia, Vancouver, British Columbia, Canada
3. Environment Canada, Air Quality Research Division, Toronto, Ontario, Canada
4. Institute for Risk Assessment Sciences, Division of Environmental Epidemiology, Utrecht University, Utrecht, the Netherlands
5. Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts, USA
6. National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, North Carolina, USA
7. College of Natural Sciences, Carleton University, Ottawa, Ontario, Canada
8. U.S. Environmental Protection Agency, Research Triangle Park, North Carolina, USA
9. Health Law Institute, University of Alberta, Edmonton, Alberta, Canada, Faculty of Law and School of Health Information Science, University of Victoria, Victoria, British Columbia, Canada
10. Firestone Institute for Respiratory Health, McMaster University, Hamilton, Ontario, Canada
11. Faculty of Health Sciences, Simon Fraser University, Burnaby, British Columbia, Canada