1 Air Pollution Exposure Lab (Carlsten), Faculty of Medicine, University of British Columbia, Vancouver, BC; Division of Respiratory Medicine (McCauley), Faculty of Medicine, University of British Columbia School, Kelowna, BC; School of Medicine (Loss), University of Limerick, Limerick, Ireland.
2 Air Pollution Exposure Lab (Carlsten), Faculty of Medicine, University of British Columbia, Vancouver, BC; Division of Respiratory Medicine (McCauley), Faculty of Medicine, University of British Columbia School, Kelowna, BC; School of Medicine (Loss), University of Limerick, Limerick, Ireland. carlsten@mail.ubc.ca.