1 Department of Medical, Surgery and Neurological Sciences, Neurology and Clinical Neurophysiology Unit, University of Siena, Policlinico Le Scotte, Viale Bracci 1, 53100, Siena, Italy.
2 Department of Medical, Surgery and Neurological Sciences, Neurology and Clinical Neurophysiology Unit, University of Siena, Policlinico Le Scotte, Viale Bracci 1, 53100, Siena, Italy. ginanneschi@unisi.it.