1. The Keenan Research Centre in the Li Ka Shing Knowledge Institute of St. Michael's Hospital, Toronto, Ontario, Canada
2. Division of Respirology, Department of Medicine, St. Michael's Hospital, Toronto, Ontario, Canada
3. Department of Medicine, University of Toronto, Toronto, Canada
4. College of Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
5. Department of Medicine, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada
6. Department of Medicine, University of Ottawa, Ottawa, Ontario, Canada
7. Division of Respiratory Medicine, The Ottawa Hospital, Ottawa, Ontario, Canada
8. Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
9. St. Michaels Hospital, Toronto, Ontario, Canada
10. Departments of Medicine and Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada