1. Alberta Asthma Centre, University of Alberta, Canada
2. Faculty of Nursing, University of Alberta, Canada
3. Division of Pulmonary Medicine, Department of Medicine, Faculty of Medicine and Dentistry, University of Alberta, Canada
4. Department of Public Health Sciences, Faculty of Medicine and Dentistry, University of Alberta, Canada
5. Department of Pediatrics, Faculty of Medicine and Dentistry, University of Alberta, Canada
6. SEARCH, Alberta Heritage Foundation for Medical Research, Canada
7. Capital Health Region, Edmonton, Alberta, Canada
8. AstraZeneca Canada Inc, Mississauga, Ontario, Canada