1 Division of Infectious Diseases (Greenaway), Jewish General Hospital; Centre for Clinical Epidemiology (Greenaway), Lady Davis Research Institute; Department of Medicine (Greenaway), McGill University, Montréal, Que.; Department of Medicine (Fabreau), Cumming School of Medicine, University of Calgary; Department of Community Health Sciences (Fabreau), Cumming School of Medicine, University of Calgary; O'Brien Institute for Public Health (Fabreau), University of Calgary, Alta.; Department of Family Medicine (Pottie), Epidemiology and Biostatics, Western University, London, Ont.; Institut du Savoir Montfort (Pottie), Ottawa, Ont. ca.greenaway@mcgill.ca.
2 Division of Infectious Diseases (Greenaway), Jewish General Hospital; Centre for Clinical Epidemiology (Greenaway), Lady Davis Research Institute; Department of Medicine (Greenaway), McGill University, Montréal, Que.; Department of Medicine (Fabreau), Cumming School of Medicine, University of Calgary; Department of Community Health Sciences (Fabreau), Cumming School of Medicine, University of Calgary; O'Brien Institute for Public Health (Fabreau), University of Calgary, Alta.; Department of Family Medicine (Pottie), Epidemiology and Biostatics, Western University, London, Ont.; Institut du Savoir Montfort (Pottie), Ottawa, Ont.