1. Department of Clinical and Experimental Medicine, Unit of Infectious Diseases, University of Catania, ARNAS Garibaldi Hospital, I-95122 Catania, Italy
2. Department of Clinical and Experimental Medicine, Section of Paediatrics and Child Neuropsychiatry, School of Specialization in Paediatrics, University of Catania, I-95124 Catania, Italy
3. Department of Medical Surgical Sciences and Advanced Technologies ‘GF Ingrassia’, Radiology Unit 1, University of Catania, I-95125 Catania, Italy
4. Department of Medical and Surgical Sciences and Advanced Technologies ‘GF Ingrassia’, ENT Section, University of Catania, I-95124 Catania, Italy
5. Department of Clinical and Experimental Medicine, University of Messina, I-98124 Messina, Italy