1. Department of Pediatrics, University of Perugia, Perugia, Italy
2. Pediatric Neurology and Muscular Diseases Unit, IRRCS Istituto Giannina Gaslini, Genova, Italy
3. Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, Università Degli Studi di Genova, Genova, Italy