1. From Columbia University, New York, NY (R.J.B.); Department of the Child and Adolescent, University of Geneva, Geneva, Switzerland (M.B.); National Heart Institute, Mexico City, Mexico (T.P.); Pfizer Ltd, Sandwich, UK (during study conduct) (G.L., I.K.); Pfizer Inc, La Jolla, CA (M.Z.); and Department of Pediatrics, University of Colorado School of Medicine and Children’s Hospital Colorado, Aurora (D.D.I.).