1. Department of Neuroradiology, Ospedale Niguarda Ca’ Granda, Piazza Ospedale Maggiore, 3, 20162 Milano, Italy
2. Neuroradiology Unit, IRCCS Policlinico San Matteo, 27100 Pavia, Italy
3. Neurology and Stroke Unit, Department of Neuroscience, ASST Grande Ospedale Metropolitano Niguarda, Piazza Ospedale Maggiore, 3, 20162 Milano, Italy
4. Department of Neuroradiology, Vito-Fazzi Hospital, 73100 Lecce, Italy