1. Department of Epidemiology, Biostatistics and Occupational Health McGill University Montreal QC Canada
2. Institut national de santé publique du Québec Montreal QC Canada
3. Department of Paediatrics McGill University Montreal QC Canada
4. Cardiology Service University of Montreal Hospital Centre Montreal QC Canada
5. University of Montreal Hospital Research Centre Montreal QC Canada
6. Department of Medicine, Department of Obstetrics and Gynaecology McGill University Health Centre Montreal QC Canada
7. Department of Social and Preventive Medicine, School of Public Health University of Montreal Montreal QC Canada