1. Department of Obstetrics and Gynecology, McMaster University, Hamilton, Ontario, Canada
2. Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada
3. Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, University of Toronto, Toronto, Ontario, Canada
4. Division of Neonatology, Department of Pediatrics, University of Toronto, Toronto, Ontario, Canada
5. Biostatistics Research Unit, University Health Network, Toronto, Ontario, Canada
6. Department of Physiology, University of Toronto, Toronto, Ontario, Canada
7. Division of Neonatology, Department of Pediatrics, McMaster University, Ontario, Canada
8. Department of Radiology, McMaster University, Hamilton, Ontario, Canada
9. Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, McMaster University, Hamilton, Ontario, Canada