1. Department of Pediatrics, University of Perugia, 06129 Perugia, Italy
2. Shands Children’s Hospital, Department of Child Neurology, University of Florida, Gainesville, FL 32608, USA
3. Neurophysipathology Service, Villa Margherita, 01027 Montefiascone, Italy
4. Unit of Pediatrics, Campus Bio-Medico University, 00128 Rome, Italy