[1] Ist Sci San Raffaele, Dept Neurol, Neuroimaging Res Unit, I-20132 Milan, Italy
[2] Univ Osped San Raffaele, I-20132 Milan, Italy
[3] Ist Sci San Raffaele, Dept Neuroradiol, I-20132 Milan, Italy
[4] Montreal Neurol Hosp & Inst, McConnell Brain Imaging Ctr, Montreal, PQ H3A 2B4, Canada
[5] Karl Frenzens Univ, Dept Neurol, Graz, Austria
[6] NYU, Sch Med, Dept Radiol, New York, NY USA
[7] Univ Colorado, Hlth Sci Ctr, Dept Radiol, Denver, CO USA
[8] Univ Bordeaux 1, Dept Neuroradiol, F-33405 Bordeaux, France
[9] Ist Nazl Neurol Carlo Besta, Dept Neuroradiol, Milan, Italy
[10] Univ Texas, Hlth Sci Ctr, Dept Neurol, Houston, TX USA