1. Department of Medicine, University Centre of the Americas, São Paulo, São Paulo, Brazil
2. KITE-Toronto Rehabilitation Institute, University Health Network and Division of Physical Medicine and Rehabilitation, University of Toronto, Toronto, Ontario, Canada
3. Medical Imaging Department, University of Toronto, Toronto, Ontario, Canada
4. Department of Medicine, Respiratory Division, University of Toronto, Toronto, Ontario, Canada
5. Asthma & Airway Centre, Toronto Western Hospital, University Health Network, Toronto, Ontario, Canada
6. Division of Respiratory Diseases, School of Medicine Pontificia Universidade Católica do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
7. Department of Medicine, Respiratory Division of McMaster University, Hamilton, Ontario, Canada