RT Journal Article SR Electronic T1 Diffusion Tensor MR Imaging of Gray Matter in Different Multiple Sclerosis Phenotypes JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 899 OP 900 VO 23 IS 6 A1 Nusbaum, Annette O. YR 2002 UL http://www.ajnr.org/content/23/6/899.abstract AB