1. Unit of Infectious Diseases, Department of Clinical and Experimental Medicine, University of Messina, 98124 Messina, Italy
2. Unit of Infectious Diseases, “Garibaldi” Hospital, 95122 Catania, Italy
3. Unit of Infectious Diseases, Department of Biomedical and Biotechnological Sciences, University of Catania, 95123 Catania, Italy
4. Unit of Pediatrics, Department of Medical and Surgical Sciences, “Alma Mater” University of Bologna, 40126 Bologna, Italy
5. Unit of Infectious Diseases, Department of Clinical and Experimental Medicine, University of Catania, 95122 Catania, Italy
6. Unit of Informatics, Department of Clinical and Experimental Medicine, University of Catania, 95123 Catania, Italy
7. Unit of Infectious Diseases, Department of Biomedical, Dental, Morphological and Functional Imaging Sciences, University of Messina, 98124 Messina, Italy