1. Psychology Department and Center for Cognitive Science, University of Turin, Via Po 14, 10123 Turin, Italy.
2. Psychology Department, University of Pavia, Piazza Botta 6, 27100 Pavia, Italy.
3. Rehabilitation Unit, G.B. Rossi University Hospital, P. le L. A. Scuro, 37134 Verona, Italy.
4. Neurology Unit, S. Orsola-Malpighi Hospital, Via Massarenti 9, 40138 Bologna, Italy.
5. Bioimaging and Molecular Physiology Institute, Consiglio Nazionale delle Ricerche, Via Fratelli Cervi 93, 20090 Segrate, Milan, Italy.