1 Department of Social and Preventive Medicine, School of Public Health, University of Montreal, Montreal, Quebec, Canada.
2 University of Montreal Hospital Research Centre, Montreal, Quebec, Canada; Institut national de santé publique du Québec, Montreal, Quebec, Canada; Department of Pediatrics, Sainte Justine Hospital Research Centre, University of Montreal, Montreal, Quebec, Canada.
3 Department of Social and Preventive Medicine, School of Public Health, University of Montreal, Montreal, Quebec, Canada; University of Montreal Hospital Research Centre, Montreal, Quebec, Canada; Institut national de santé publique du Québec, Montreal, Quebec, Canada; Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, Quebec, Canada. Electronic address: nathalie.auger@inspq.qc.ca.