1 Department of Neurosurgery (HIB, TM-P, MB, BR-M), Hospital Infantil Universitario Niño Jesús; Department of Intensive Care (AG-S, AMA-G, MN-M, IL-G), Hospital Infantil Universitario Niño Jesús, Madrid; Department of Neurosurgery (DL), Azienda Ospedaliero Universitaria Senese Le Scotte, Siena, Italy; and Department of Neurosurgery (RGM), Complejo Hospitalario Universitario de Badajoz, Badajoz, Spain.