RT Journal Article SR Electronic T1 Multiple Sclerosis and Chronic Cerebrospinal Venous Insufficiency: The Neuroimaging Perspective JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 424 OP 427 DO 10.3174/ajnr.A2348 VO 32 IS 3 A1 Filippi, M. A1 Rocca, M.A. A1 Barkhof, F. A1 Bakshi, R. A1 Fazekas, F. A1 Khan, O. A1 Pelletier, D. A1 Rovira, A. A1 Simon, J. YR 2011 UL http://www.ajnr.org/content/32/3/424.abstract AB