1. Department of Medicine, University of Toronto, Toronto, Ontario, Canada
2. ICES, Toronto, Ontario, Canada
3. Department of Medicine, St Michael’s Hospital, Toronto, Ontario, Canada
4. Department of Obstetrics and Gynaecology, St Michael’s Hospital, Toronto, Ontario, Canada
5. Department of Anesthesia and Pain Medicine, The Hospital for Sick Children, Toronto, Ontario, Canada
6. Child Health Evaluative Sciences, The Hospital for Sick Children, Toronto, Ontario, Canada
7. Department of Pediatrics, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
8. Department of Obstetrics and Gynaecology, University of Ottawa, Ottawa, Ontario, Canada
9. The Society of Obstetricians and Gynaecologists of Canada, Ottawa, Ontario, Canada