1. Institute of Pharmacology (S.C., G.C., I.S., A.P.C.), University of Messina, Italy
2. Institute of Pharmacology Sciences (S.S., A.M.), University of Milano, Italy
3. Department of Experimental Pharmacology (L.S.), University “Federico II”, Naples, Italy
4. Department of Biomorphology (E.M.), School of Medicine, University of Messina, Italy