1 Institute of Neurology, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy. Electronic address: giuseppe.granata@policlinicogemelli.it.
2 Institute of Neurology, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy; Area of Neuroscience, San Raffaele Pisana IRCCS, Rome, Italy.
3 Institute of Ophthalmology, Fondazione Policlinico Gemelli IRCCS, Rome, Italy.
4 Area of Neuroscience, San Raffaele Pisana IRCCS, Rome, Italy.