1. From Columbia University, New York, NY (R.J.B.); Department of Pediatrics, University of Colorado School of Medicine and Children's Hospital Colorado, Aurora (D.D.I.); Department of Pediatric Cardiology, UNICAR, Guatemala City, Guatemala (G.G.); Department of Pediatric Cardiology, Gottsegen György Hungarian Institute of Cardiology, Budapest, Hungary (A.S.); Pediatric Cardiology, Jagiellonian Univeristy, Cracow, Poland (A.R.); Fundacion Cardioinfantil, Bogotá, Colombia (A.E.G.); Department of...