1. Department of Medicine,
2. Department of Community Health Sciences,
3. Department of Biostatistics, and
4. Department of Medicine, McGill University, Montreal, Quebec, Canada;
5. Department of Medicine and
6. Firestone Institute for Respiratory Health, Department of Medicine, McMaster University, Hamilton, Ontario, Canada;
7. Département de Médecine, Centre Hospitalier de l’Université de Montréal, Montreal, Quebec, Canada;
8. Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada;
9. Chronic Disease and Pharmacotherapy, ICES, Toronto, Ontario, Canada;
10. Child Health Evaluative Sciences, The Hospital for Sick Children, Toronto, Ontario, Canada;
11. Department of Internal Medicine, University of Manitoba, Winnipeg, Manitoba, Canada;
12. Department of Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada; and
13. Respiratory Evaluation Sciences Program, Collaboration for Outcomes Research and Evaluation, Faculty of Pharmaceutical Sciences, University of British Columbia, Vancouver, British Columbia, Canada;
14. Centre for Heart Lung Innovation, St. Paul’s Hospital, Vancouver, British Columbia, Canada
15. Department of Geography, University of Calgary, Calgary, Alberta, Canada;