1. Division of Cardiology, Pregnancy and Heart Disease Program, Mount Sinai Hospital, University of Toronto, Toronto, Canada
2. Division of Cardiology, Fetal Cardiac Program, Labatt Family Heart Centre, The Hospital for Sick Children, University of Toronto, Toronto, Canada
3. Department of Obstetrics and Gynecology, Division of Maternal and Fetal Medicine, Mount Sinai Hospital, University of Toronto, Toronto, Canada