1 Pediatric Neurology and Muscular Diseases Unit, Department of Neurosciences, "G. Gaslini" Institute, Genova, Italy. Electronic address: elisabettagazzerro@ospedale-gaslini.ge.it.
2 Pediatric Neurology and Muscular Diseases Unit, Department of Neurosciences, "G. Gaslini" Institute, Genova, Italy; Pediatric Neurology and Muscular Diseases Unit, Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, University of Genoa, G. Gaslini Institute, Genova, Italy.