[1] W Pk Healthcare Ctr, Dept Resp Med, Toronto, ON M6M 2J5, Canada
[2] W Pk Healthcare Ctr, Resp Diagnost & Evaluat Serv, Toronto, ON M6M 2J5, Canada
[3] Univ Toronto, Dept Phys Therapy, Toronto, ON, Canada
[4] Univ Toronto, Dept Med, Toronto, ON, Canada
[5] Curtin Univ Technol, Sch Physiotherapy, Bentley, WA 6102, Australia
[6] Curtin Univ Technol, Curtin Hlth Innovat Inst, Bentley, WA 6102, Australia
[7] Univ Western Australia, Ctr Asthma Allergy & Resp Res, Crawley, WA, Australia
[8] Univ Western Australia, Lung Inst Western Australia, Crawley, WA, Australia