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1 From the Departments of Medicine, Clinical Epidemiology, and Biostatistics, McMaster University, Hamilton, ON (D.C.), and the Department of Medicine, Dalhousie University, Halifax, NS (G.R.) - both in Canada.
1 From the Departments of Medicine, Clinical Epidemiology, and Biostatistics, McMaster University, Hamilton, ON (D.C.), and the Department of Medicine, Dalhousie University, Halifax, NS (G.R.) - both in Canada.