1. Unit of Infectious Diseases, Department of Clinical and Experimental Medicine, University of Catania, ARNAS Garibaldi Hospital, I‑95122 Catania, Italy
2. Department of Clinical and Experimental Medicine, Unit of Infectious Diseases, University of Messina, I‑98124 Messina, Italy
3. Department of Pharmacological Sciences, Università del Piemonte Orientale ‘A. Avogadro’, I‑28100 Novara, Italy