1. Division of Infectious Diseases, Department of Clinical and Experimental Medicine, ARNAS Garibaldi Hospital, I‑95122 Catania, Italy
2. Unit of Intensive Care, ARNAS Garibaldi Hospital, I‑95122 Catania, Italy
3. Department of Clinical and Experimental Medicine, Unit of Infectious Diseases, University of Messina, I‑98124 Messina, Italy