1. Unit of Rare Diseases of the Nervous System in Childhood, Department of Clinical and Experimental Medicine, Section of Pediatrics and Child Neurospychiatry, University of Catania, Catania, Italy
2. Maurice Wohl Clinical Neuroscience Institute, King's College London, London, United Kingdom
3. Section of Psychology, Department of Educational Sciences, University of Catania, Catania, Italy
4. Department of Medical and Surgical Sciences and Advanced Technology “G.F. Ingrassia,” University of Catania, Catania, Italy
5. Dermatology Clinic, University of Catania, Catania, Italy
6. Unit of Dermatology, Oasi Research Institute-IRCCS, Troina, Enna, Italy
7. Unit of Pediatrics, Carpi Hospital, Carpi, Italy