1. Department of Neuroscience; Neuroscience Institute Cavalieri Ottolenghi (NICO), Università degli Studi di Torino; Regione Gonzole 10-10043 Orbassano (Turin) Italy
2. CNR-Institute of Neuroscience; Department of Medical Pharmacology; University of Milan; Milan Italy
3. Embryology and Stem Cell Biology; Department of Biomedicine; University of Basel; CH-4058 Basel Switzerland
4. Laboratory of Molecular and Cellular Pharmacology of Purinergic Transmission; Department of Pharmacological and Biomolecular Sciences; Università degli Studi di Milano; 20133 Milan Italy