1. Pediatric ICU, Department of Anesthesia and Critical Care, Fondazione IRCCS Ca’ Granda, Ospedale Maggiore Policlinico, Milan, Italy;
2. Pediatric ICU, Department of Anaesthesiology and Intensive Care, University Hospital “A. Gemelli,” Catholic University of the Sacred Heart, Rome, Italy;
3. University of Milan, Milan, Italy;
4. Department of Anesthesia and Intensive Care, Children’s Hospital Vittore Buzzi, Istituti Clinici di Perfezionamento, Milan, Italy; and
5. Department of Surgical Sciences and Integrated Diagnostics, University of Genoa, IRCCS AOU San Martino – IST, Genoa, Italy