1. Respiratory Epidemiology and Clinical Research Unit, Research Institute of McGill University Health Centre, Montréal, Québec, Canada;
2. Division of Experimental Medicine, Department of Medicine, McGill University, Montreal, Québec, Canada;
3. Department of Pneumology, Vall d'Hebron Hospital, Barcelona, Spain;
4. Department of Medicine, Islamic Azad University-Yazd Branch, Yazd, Iran