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- From *the Division of General Internal Medicine, University of Alberta, Edmonton, Alta.; †the Division of General Internal Medicine, University of Calgary, Calgary, Alta.; ‡the Division of General Internal Medicine, London Health Sciences Centre, London, Ont.; §the Centre for the Evaluation of Medicines, McMaster University, Hamilton, Ont.; and ¶the Clinical Epidemiology Unit, Loeb Health Research Centre, Ottawa, Ont.