1. Boston University School of Public Health, Department
of Environmental Health, 715 Albany Street T4W, Boston, Massachusetts 02118, United States
2. Division of Analytical & Environmental Toxicology, Department of Laboratory Medicine & Pathology, University of Alberta, Edmonton, Alberta T6G 2R3, Canada
3. Air
Quality Processes Research Section, Environment and Climate Change Canada, Toronto, Ontario M3H 5T4, Canada
4. Environmental
Health Services, BC Centre for Disease Control, Vancouver, British Columbia V5Z 4R4, Canada
5. Faculty
of Health Sciences, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada