1. Department of Pharmaceutical SciencesUniversity of Catania Catania 95125 Italy
2. Department of Experimental and Clinical PharmacologyUniversity of Catania Catania 95125 Italy
3. Department of Human Physiology and PharmacologyUniversity of Rome “La Sapienza” Rome 00185 Italy
4. I.N.M. Neuromed Pozzilli 86077 Italy
5. Department of Chemical SciencesUniversity of Catania Catania 95125 Italy
6. Institute of Respiratory DiseasesUniversity of Catania Catania 95125 Italy