1 Department of Clinical and Experimental Medicine, University of Catania, Catania, Italy.
2 Department of Brain and Behavioral Sciences, University of Pavia, Pavia, Italy.
3 Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, Section of Psychiatry, University of Genoa, Genoa, Italy.
4 Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Ospedale Policlinico San Martino, Genoa, Italy.