1. Pediatrics Department, University of Siena, Siena, Italy
2. Center of Pediatric Neurology, Bologna University, Bologna, Italy
3. Pediatric Department, La Sapienza University, Rome, Italy
4. Division of Pediatric Neurology, Department of Pediatrics, University of Catania, Catania, Italy
5. Pediatric Neurology Department, Children's Hospital G. Salesi, Ancona, Italy
6. Department of Pediatrics, University of Padova
7. Section of Pediatrics, Department of Medicine, University of Chieti, Chieti, Italy
8. Department of Pediatrics, 2- University La Sapienza, Rome, Italy
9. Pediatrics Department, University of Siena, Siena, Italy,