1. From the Division of Cardiology, Department of Medicine, Brigham and Women’s Hospital, Department of Medicine, Harvard Medical School, Boston, MA (A.M.V.); Department of Cardiology, Boston Children’s Hospital, Harvard Medical School, Boston, MA (A.M.V.); and Department of Obstetric and Gynecology, Maternal-Fetal Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA (K.E.E.)