1. Pediatric Cardiac Surgery Unit, Heart Hospital, G. Monasterio Foundation, Massa, Italy
2. Pediatric Intensive Care Unit and Bronchoscopy Service, Meyer Children Hospital, Florence, Italy
3. Pediatric Cardiology Unit, Heart Hospital, G. Monasterio Foundation, Massa, Italy
4. Pediatric Cardiac Intensive Care Unit, Heart Hospital, G. Monasterio Foundation, Massa, Italy
5. Pediatric Surgery Unit, Meyer Children Hospital, Florence, Italy
6. Clinical Trial Office, Meyer Children Hospital, Florence, Italy