1 Center for Experimental Neurological Therapies-CENTERS, S Andrea Hospital, II Faculty of Medicine, Sapienza University of Rome, Rome 00189, Italy.
2 National Centre of Epidemiology, National Institute of Health; Rome, Italy.
3 Center for Experimental Neurological Therapies-CENTERS, S Andrea Hospital, II Faculty of Medicine, Sapienza University of Rome, Rome 00189, Italy. Electronic address: giovanni.ristori@uniroma1.it.