1 Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada (Drs Aviram and Melamed); Temerty Faculty of Medicine, Department of Obstetrics and Gynecology, University of Toronto, Toronto, Ontario, Canada (Drs Aviram and Melamed). Electronic address: amir.aviram@sunnybrook.ca.
2 Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada (Drs Aviram and Melamed); Temerty Faculty of Medicine, Department of Obstetrics and Gynecology, University of Toronto, Toronto, Ontario, Canada (Drs Aviram and Melamed).
3 Department of Obstetrics and Gynecology, McMaster University, Hamilton, Ontario, Canada (Dr Barrett).