1. Multiple Sclerosis Study Center, Sant’Antonio Abate Hospital, Gallarate, Italy
2. Department of Neurology, San Raffaele Hospital, Milan, Italy
3. Department of Neuroradiology, Sant’Antonio Abate Hospital, Gallarate, Italy
4. Department of Neurology, San Raffaele Hospital, Milan, Italy/Division of Neuroscience, Department of Neurology, Institute of Experimental Neurology, San Raffaele Scientific Institute, Milan, Italy