1 IRCCS Ospedale San Raffaele, Department of Clinical Neurosciences, Milan, Italy; C.E.R.M.A.C. (Centro di Eccellenza Risonanza Magnetica ad Alto Campo), University Vita-Salute San Raffaele, Milan, Italy. Electronic address: b.vai@hotmail.it.
2 IRCCS Ospedale San Raffaele, Department of Clinical Neurosciences, Milan, Italy.
3 IRCCS Ospedale San Raffaele, Department of Clinical Neurosciences, Milan, Italy; C.E.R.M.A.C. (Centro di Eccellenza Risonanza Magnetica ad Alto Campo), University Vita-Salute San Raffaele, Milan, Italy.