1. Department of Medicine, McMaster University, Hamilton, Ontario, Canada (T.P.)
2. Department of Medicine, Dalhousie University, Halifax, Nova Scotia, Canada (J.M., Y.G.)
3. Michael G. DeGroote School of Medicine, McMaster University, Hamilton, Ontario, Canada (S.R., K.D.)
4. Department of Respirology, University of Toronto, Toronto, Ontario, Canada (C.R.)
5. Departments of Anesthesiology and Health Research Methods Evidence and Impact, McMaster University, Hamilton, Ontario, Canada (J.W.B., D.Z.).