1. Gennaro Bussone, Massimo Leone, Department of Neurology, Istituto Neurologico “C. Besta”, via Celoria 11, 20133 Milano, Italy; Giorgio Dalla Volta, Vincenzo Di Monda, Neurological Institute, University of Brescia, Italy; Liliana Strada, Department of Neuroradiology, Istituto Neurologico “C. Besta”, via Celoria 11, 20133 Milano, Italy; Roberto Gasparotti, Neuroradiological Institute, University of Brescia, Italy;