1. Department of Anesthesia and Intensive Care; Città Della Salute e della Scienza; Regina Margherita Children's Hospital; Torino Italy
2. Department of Anesthesiology, Perioperative and Pain Medicine; Boston Children's Hospital; Boston MA USA
3. Department of Anesthesia and Intensive Care; Vittorio Emanuele University Hospital; Catania Italy
4. Department of Anesthesia and Intensive Care; Papa Giovanni XXIII Hospital; Bergamo Italy