1. Division of Pulmonary Medicine, Department of Medicine,
2. Alberta Respiratory Centre,
3. Women and Children’s Health Research Institute,
4. Alberta Health Services, and
5. Provincial Research Data Services, Alberta Health Services, Edmonton, Alberta, Canada;
6. Alberta Strategy for Patient Oriented Research Unit, Edmonton, Alberta, Canada;
7. Department of Community Health Sciences, Cumming School of Medicine, and
8. O’Brien Institute for Public Health, University of Calgary, Calgary, Alberta, Canada
9. Division of General Internal Medicine, Department of Medicine, and
10. Medicine Strategic Clinical Network – Respiratory Health Section,
11. Department of Physical Therapy, University of Alberta, Edmonton, Alberta, Canada;