1. Respiratory Investigation Unit, Department of Medicine, Queen’s University, and Kingston Health Sciences Centre, Kingston, Ontario, Canada
2. Department of Chest Diseases, Faculty of Medicine, Alexandria University, Alexandria, Egypt
3. Centre for Heart Lung Innovation, Providence Health Care Research Institute, University of British Colombia, St. Paul’s Hospital, Vancouver, British Columbia, Canada
4. Division of Respiratory Medicine, Department of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
5. Department of Physiology and Pharmacology, Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada