1. Respiratory Epidemiology and Clinical Research Unit, Research Institute of McGill University Health Center, McGill University, Montréal, Canada
2. Snyder Institute for Chronic Diseases, Department of Critical Care Medicine, University of Calgary, Calgary, Canada
3. Departments of Medicine, Pathology & Pharmacology & Therapeutics, McGill University, Montreal, Canada
4. Research Institute of the McGill University Health Center, Montreal, Canada
5. Department of Medicine, Division of Experimental Medicine, McGill University, Montreal, Canada