1. Department of Clinical and Experimental Medicine, University of Catania, 95123 Catania, Italy
2. Department of Biomedical and Biotechnological Sciences, University of Catania, 95123 Catania, Italy
3. Unit of Infectious Diseases, Department of Clinical and Experimental Medicine, University of Messina, 98124 Messina, Italy
4. Unit of Infectious Diseases, School of Medicine and Surgery, Kore University of Enna, 94100 Enna, Italy
5. Neonatal Intensive Care Unit, ARNAS Garibaldi Hospital, 95124 Catania, Italy