1. Department of Medicine, University of British Columbia, Vancouver, British Columbia, Canada;
2. Centre for Heart Lung Innovation, St. Paul's Hospital, University of British Columbia, Vancouver, British Columbia, Canada
3. Department of Environmental Health, Harvard University, Boston, Massachusetts;
4. Department of Physiology and Pharmacology, University of Calgary, Alberta, Canada;
5. Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada; and