Center for Neuroscience and Cognitive Systems @UniTn, Istituto Italiano di Tecnologia, Rovereto, Italy, Centre National de la Recherche Scientifique, Paris, France, Université Paris Descartes, Centre de Neurophysique, Physiologie et Pathologie, Paris, France, Departments of Statistics and Neurobiology, University of Chicago, Chicago, Illinois, United States of America.