1. Section of Pharmacology and Toxicology; Department of Pharmacy; University of Genova; Genova Italy
2. Centre of Excellence for Biomedical Research CEBR; University of Genova; Viale Benedetto Genova Italy
3. Section of Biochemistry; Department of Experimental Medicine, and Italian Institute of Biostructures and Biosystems; University of Genova; Genova Italy
4. Department of Neuroscience; University of Padova; Padova Italy
5. Department of Diagnostic; Clinical Medicine and Public Health; University of Modena and Reggio Emilia; Modena Italy
6. Department of Neuroscience; Karolinska Institutet; Stockholm Sweden
7. Department of Biomedical and NeuroMotor Sciences DIBINEM; Alma Mater Studiorum; University of Bologna; Bologna Italy
8. IRCCS Istituto delle Scienze Neurologiche di Bologna; Bologna Italy
9. Structural Biology Unit; National Institutes of Health; National Institute of Drug Abuse-Intramural Research Program; Baltimore MD USA