1. Department of Radiology, University of Cagliari, Cagliari, Italy
2. Unit of Child and Adolescent Neuropsychiatry, Department of Biomedical Sciences, University of Cagliari, Cagliari, Italy
3. Child Neuropsychiatry Unit, Department of Medicine, Surgery and Pharmacy, University Hospital of Sassari, Sassari, Italy
4. Department of Medical Sciences and Public Health, Multiple Sclerosis Center, Binaghi Hospital, University of Cagliari, Cagliari, Italy