1. Unit of Pediatrics and Pediatric Emergency; University Hospital “Policlinico-Vittorio Emanuele”; Catania Italy
2. Unit of Genetics and Immunology; Department of Pediatrics; University of Messina; Catania Italy
3. Institute of Orthopedics; University Hospital “Policlinico-Vittorio Emanuele”; Catania Italy
4. Institute of Medical Genetics; “CSS-Mendel” Institute; Rome Italy
5. Department of Educational Sciences; Chair of Pediatrics; University of Catania; Catania Italy
6. Institute of Neurosurgery; Department of Neurosciences; University of Catania; Catania Italy