1. From the Division of Cardiology, Department of Medicine (K.M., J.S.F., J.D.P.) and Maternal-Fetal Medicine Division, Department of Obstetrics and Gynaecology (R.R.S., J.C.K.), Sinai Health System, University of Toronto, ON, Canada; and Centre for Women’s and Infant’s Health, Lunenfeld-Tanenbaum Research Institute, Sinai Health System, Toronto, ON, Canada (K.M., J.C.K.).