Multiparametric magnetic resonance imaging analysis of the corticospinal tract in multiple sclerosis. - Daniel S. Reich; Seth A. Smith; Kathleen M. Zackowski; Eliza M. Gordon-Lipkin; Craig K. Jones; Jonathan A. D. Farrell; Susumu Mori; Peter C. M. van Zijl; Peter A. Calabresi (NeuroImage, 2007)