1. Department of Clinical and Experimental Medicine, University of Messina, I‑98124 Messina, Italy
2. Unit of Infectious Diseases, Department of Clinical and Experimental Medicine, University of Catania, ARNAS Garibaldi Hospital, I‑95122 Catania, Italy
3. Department of Biomedical and Biotechnological Sciences, University of Catania, I‑95123 Catania, Italy
4. Unit of Infectious Diseases, ARNAS Garibaldi Hospital, I‑95122 Catania, Italy