1. Neurology Unit, Department of Medicine; S. Anna Hospital; Como Italy
2. Pediatric Neurology and Muscular Diseases Unit, Department of Neurosciences, Rehabilitation, Ophtalmology, Genetics, Maternal and Child Health; University of Genoa, “G. Gaslini” Institute; Genova Italy
3. Child Neurology & Paediatric Headache Centre, Chair of Paediatrics, NESMOS Dpt; University of Rome ‘Sapienza’, Faculty of Medicine & Psychology, c/o “S. Andrea” Hospital; Rome Italy