Javier Urbano1, Jesús López-Herce1, Ángel Carrillo1, Martha Matamoros2. 1. Pediatric Intensive Care Unit, Department of Pediatrics, Hospital General Universitario Gregorio Marañón, Madrid, Spain. 2. Pediatric Intensive Care Unit and Emergency, Department of Pediatrics, Hospital Escuela, Tegucigalpa, Honduras.