1 The Single Ventricle Survivorship Program, The Cardiac Center, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania; Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania. Electronic address: rychik@email.chop.edu.
2 The Philadelphia Adult Congenital Heart Disease Program, The Cardiac Center, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania; Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania.