1. Department of Paediatric Anesthesia and Intensive Care, Meyer Children Hospital, Florence, Italy
2. Department of Paediatrics, ‘Sapienza’ University of Rome, Rome, Italy
3. Department of Radiology, Meyer Children Hospital, Florence, Italy
4. Heart Hospital, G. Monasterio Tuscany Foundation, Massa, Italy
5. Department of Pediatric and Congenital Cardiac Surgery and Cardiology, Ospedali Riuniti, Ancona, Italy