1. Department of Biomedical and Biotechnological Sciences, Physiology Section, University of Catania, 95125 Catania, Italy
2. Department of Drug Sciences, Pharmacology and Toxicology Section, University of Catania, 95125 Catania, Italy
3. Department G.F. Ingrassia, Azienda Ospedaliero-Universitaria “Policlinico-Vittorio Emanuele” Anatomic Pathology, University of Catania, 95125 Catania, Italy