1. Department of Physical Therapy, Faculty of Medicine The University of British Columbia Vancouver British Columbia Canada
2. Centre for Heart Lung Innovation, Providence Research The University of British Columbia and St. Paul's Hospital Vancouver British Columbia Canada
3. Division of Respiratory Medicine, Faculty of Medicine The University of British Columbia Vancouver British Columbia Canada
4. Centre for Health Evaluation and Outcome Services, Providence Research The University of British Columbia and St. Paul's Hospital Vancouver British Columbia Canada
5. School of Kinesiology, Faculty of Education The University of British Columbia Vancouver British Columbia Canada
6. Department of Family Practice, Faculty of Medicine The University of British Columbia Vancouver British Columbia Canada