1. Maternal, Child and Youth Health Division, Centre for Surveillance and Applied Research Public Health Agency of Canada Ottawa ON Canada
2. Department of Medical Genetics University of British Columbia Victoria BC Canada
3. Department of Obstetrics and Gynecology McMaster University Hamilton ON Canada
4. Department of Pediatrics and of Epidemiology and Biostatistics McGill University Montreal QC Canada
5. Perinatal Program of Newfoundland and Labrador St. John’s NFL Canada
6. Department of Medicine University of Toronto Toronto ON Canada
7. Department of Obstetrics and Gynaecology Dalhousie University Halifax NS Canada
8. Department of Obstetrics and Gynaecology University of British Columbia Vancouver BC Canada