1. Faculty of Medicine, University of Toronto, Sunnybrook Health Sciences Centre & University of Toronto, Toronto, Ontario, Canada
2. Department of Medical Imaging, Sunnybrook Health Sciences Centre & University of Toronto, Toronto, Ontario, Canada
3. Department of Medicine, Division of Respirology, Sunnybrook Health Sciences Centre & University of Toronto, Toronto, Ontario, Canada
4. Department of Medicine, Divisions of Dermatology and Clinical Pharmacology, Sunnybrook Health Sciences Centre & University of Toronto, Toronto, Ontario, Canada