1. Department of Ophthalmology, University of Catania, I‑95123 Catania, Italy
2. Department of Drug Sciences, Section of Biochemistry, University of Catania, I‑95125 Catania, Italy
3. Department of Surgical Sciences, Eye Clinic Section, University of Turin, I‑10122 Turin, Italy
4. Department of Experimental Biomedicine and Clinical Neuroscience, Ophthalmology Section, University of Palermo, I‑90127 Palermo, Italy
5. Department ‘G.F. Ingrassia’, Section of Anatomic Pathology, University of Catania, I‑95123 Catania, Italy
6. Department of Biomedical and Biotechnological Sciences, University of Catania, I‑95123 Catania, Italy
7. Epidemiology Unit, IRCCS Istituto Nazionale Tumori ‘Fondazione G. Pascale’, I‑80131 Naples, Italy