1. From the Department of Medicine (R.P.R., A.P.S., A.A.P., A.B., A.S.D.) and Institute for Health Policy Management and Evaluation (A.S.D.), University of Toronto, and the Department of Medicine, University Health Network and Mount Sinai Hospital (A.A.P., A.B., A.S.D.), Toronto, and the Department of Medicine, University of Ottawa, Ottawa (A.B.) — all in Canada.