aInstitute for Clinical Evaluative Sciences, Department of Health Policy, Management and Evaluation, University of Toronto, Toronto, Ontario, Canada
bDepartment of Health Policy, Management and Evaluation, Department of Medicine, University of Toronto, St. Michael's Hospital, Toronto, Ontario, Canada
cInstitute for Clinical Evaluative Sciences, Department of Health Policy, Management and Evaluation, Department of Medicine, University of Toronto, Department of Emergency Services, Clinical Epidemiology Unit, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada
Funding and support: By Annals policy, all authors are required to disclose any and all commercial, financial, and other relationships in any way related to the subject of this article that might create any potential conflict of interest. The authors have stated that no such relationships exist. See the Manuscript Submission Agreement in this issue for examples of specific conflicts covered by this statement.
