1. Department of General Surgery and Medical-Surgical Specialties, University of Catania, Via Santa Sofia 78, 95123 Catania, Italy
2. Unit of Internal Medicine Critical Area—ARNAS Garibaldi, Piazza Santa Maria di Gesù, 5, 95124 Catania, Italy
3. Department of Biomedical and Biotechnological Sciences, University of Catania, Via Santa Sofia 97, 95123 Catania, Italy