1. School of Public and Environmental Affairs, Indiana University, Bloomington, Indiana 47405, United States
2. Department of Physical and Environmental Science, University of Toronto Scarborough, Toronto, Ontario M1C 1A4, Canada
3. Air Quality Processes Research Section, Environment and Climate Change Canada, Toronto, Ontario M3H 5T4, Canada
4. Department of Earth Sciences, University of Toronto, Toronto, Ontario M5S 3B1, Canada
5. Research Centre for Toxic Compounds in the Environment (RECETOX), Masaryk University, Kamenice 753/5, pavilion A29, 62500 Brno, Czech Republic
6. Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario M5G 1X3, Canada
7. Occupational Cancer Research Centre, Cancer Care Ontario, Ontario M5G 2L3, Canada