1 University of Montreal Hospital Research Centre, Montreal, Quebec, Canada; Department of Epidemiology, Biostatistics, and Occupational Health, McGill University, Montreal, Quebec, Canada; Department of Social and Preventive Medicine, School of Public Health, University of Montreal, Montreal, Quebec, Canada. Electronic address: nathalie.auger@umontreal.ca.
2 University of Montreal Hospital Research Centre, Montreal, Quebec, Canada.
3 Department of Obstetrics and Gynecology, Sherbrooke University Hospital Research Centre, Sherbrooke, Quebec, Canada.