1. Department of Social and Preventive Medicine; Faculty of Medicine, Université Laval; Quebec City; QC; Canada
2. Harris Birthright Research Centre of Fetal Medicine; King's College Hospital; London; UK
3. Department of Obstetrics and Gynecology; Faculty of Medicine, Université Laval; Quebec City; QC; Canada
4. Department of Obstetrics and Gynecology; University of Helsinki and Helsinki University Central Hospital; Helsinki; Finland