1. Department of Clinical and Experimental Medicine, Unit of Infectious Diseases, University of Messina, I‑98124 Messina, Italy
2. Department of Clinical and Experimental Medicine, Unit of Infectious Diseases, ARNAS Garibaldi Hospital, University of Catania, I‑95122 Catania, Italy
3. Department of Anatomy, Diagnostic Pathology, Legal Medicine Hygiene and Public Health, University of Catania, I‑95123 Catania, Italy