RT Journal Article SR Electronic T1 New frontiers of MR-based techniques in multiple sclerosis JF Journal of Neurology, Neurosurgery & Psychiatry JO J Neurol Neurosurg Psychiatry FD BMJ Publishing Group Ltd SP 515 OP 515 VO 75 IS 3 A1 P Matthews YR 2004 UL http://jnnp.bmj.com/content/75/3/515.2.abstract AB