1. From the Division of Infectious Diseases (J.-W.C., S.J.S., J.M.B.), Children’s Hospital of Philadelphia and Department of Pediatrics, University of Pennsylvania School of Medicine, Philadelphia; Departments of Pediatrics (B.Z., K.J., H.S.B.) (Cardiology) and Cell and Developmental Biology (H.S.B.), Vanderbilt University Medical Center, Nashville, Tenn; Biomedical Imaging Core Laboratory (Q.-C.Y.), University of Pennsylvania School of Medicine, Philadelphia; and Center for Cardiovascular Development ...