?:authorAffiliation
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[\'Centre for Surveillance and Applied Research, Public Health Agency of Canada, Ottawa, ON; School of Epidemiology and Public Health, University of Ottawa, Ottawa, ON. Electronic address: shiliang.liu@phac-aspc.gc.ca.\', \'Centre for Surveillance and Applied Research, Public Health Agency of Canada, Ottawa, ON.\', \'Department of Obstetrics and Gynecology, Sainte-Justine Hospital Research Centre, University of Montréal, Montréal, QC; Bureau d\'information et d\'études en santé des populations, Institut national de santé publique du Québec, Montréal, QC.\', \'School of Epidemiology and Public Health, University of Ottawa, Ottawa, ON.\', \'Department of Obstetrics and Gynaecology, Dalhousie University and the IWK Health Centre, Halifax, NS.\', \'Department of Obstetrics and Gynaecology, BC Children\'s and Women\'s Hospital and Health Centre, and the University of British Columbia, Vancouver, BC; School of Population and Public Health, University of British Columbia, Vancouver, BC.\']
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