1. Department of Medical and Surgical Sciences, Pediatric Unit, Department of Pediatrics, University “Magna Graecia,” Catanzaro, Italy
2. Department of Pediatrics, University of Messina, Messina, Italy
3. National Centre for Rare Diseases, Istituto Superiore di Sanità, Rome, Italy
4. Department of Clinical and Experimental Medicine, Section of Pediatrics and Child Neuropsychiatry, University of Catania, Catania, Italy