1. Neuroimaging Research Unit, Department of Neurology, San Raffaele Scientific Institute, Milan, Italy
2. MS NMR Research Unit, Institute of Neurology, University College London, London, UK
3. Department of Neuroimmunology Hospital Vall d'Hebron, Barcelona, Spain, Department of Radiology, Hospital Vall d'Hebron, Barcelona, Spain
4. DISSAL, Unit of Biostatistics, University of Genoa, Genoa, Italy
5. Departments of Neuroradiology and Neurology, VU University Medical Centre, Amsterdam, The Netherlands
6. Department of Neurology, University of Siena, Siena, Italy
7. Neuroimaging Research Unit, Department of Neurology, San Raffaele Scientific Institute, Milan, Italy,