1. Department of G.F. Ingrassia, Section of Hygiene and Public Health, University of Catania, Catania, Italy, and Department of Molecular and Clinical Biomedicine, Section of Pharmacology and Biochemistry, University of Catania, Catania, Italy
2. Department of G.F. Ingrassia, Section of Hygiene and Public Health, University of Catania, Catania, Italy
3. University Medical School of Catania, Catania, Italy
4. Department of School Policies, Municipality of Catania, Catania, Italy
5. Department of Molecular and Clinical Biomedicine, Section of Pharmacology and Biochemistry, University of Catania, Catania, Italy