1 Dipartimento di Psicologia, Università degli Studi di Roma "La Sapienza", Italy; Fondazione Santa Lucia IRCCS, Roma, Italy. Electronic address: fabrizio.doricchi@uniroma1.it.
2 Department of Neurology, Medical Faculty, RWTH Aachen University, Germany.
3 Department of Neuroscience, Psychology, Pharmacology and Child Health, University of Florence, Florence, Italy.