1. From the Division of Cardiology (S.K.P.), Department of Pediatrics, Duke University Medical Center and Duke Clinical Research Institute, Durham, NC; Child Health Corporation of America (M.H.), Shawnee Mission, Kan; Departments of Pediatrics and Medicine (A.D.S.), Carilion Medical Center, Roanoke, Va; Department of Cardiology (K.J.J.), Children’s Hospital, Boston, Mass; Divisions of Cardiology and Critical Care, Department of Pediatrics (B.S.M.), Cincinnati Children’s Hospital Medical Center,...