1. AOU “Vittorio Emanuele-Policlinico” University Hospital Catania, Italy
2. Department of Pediatrics, University of Catania, Catania, Italy
3. Chair of Pediatrics, Department of Formative Processes, University of Catania, Catania, Italy
4. Chair of Pediatric Neurology, Department of Pediatrics, University of Chieti, Chieti, Italy