1. Respiratory Epidemiology and Clinical Research UnitResearch Institute of the McGill University Health Centre, McGill University Montreal QC Canada
2. Pneumology DepartmentVall d'Hebron University Hospital Barcelona Spain
3. Providence Heart & Lung Institute, University of British Columbia, St Paul's Hospital, UBC James Hogg Research Centre, Vancouver BC Canada
4. Ottawa University Ottawa ON Canada
5. University of Toronto Toronto ON Canada
6. University of Calgary Calgary AB Canada
7. Faculty of Medicine, Dalhousie University, Halifax NS Canada
8. Institut universitaire de cardiologie et de pneumologie de QuébecUniversité Laval QC Québec Canada
9. Respiratory Research CenterUniversity of Saskatchewan Saskatoon SK Canada
10. Respiratory Investigation Unit, Division of Respirology, Department of MedicineKingston Health Sciences Centre and Queen's University Kingston ON Canada