[1] St. Michael’s Hospital,Division of Respirology, Department of Medicine
[2] Institute for Clinical and Evaluative Sciences,Department of Medicine
[3] University of Toronto,Institute of Health Policy, Management, and Evaluation
[4] University of Toronto,Women’s College Research Institute
[5] Women’s College Hospital,Department of Medicine and Keenan Research Centre in the Li Ka Shing Knowledge Institute
[6] St. Michael’s Hospital,Department of Medicine
[7] Queen’s University,Division of Internal Medicine, Department of Medicine
[8] Mount Sinai Hospital,undefined