The Etiology of Ring Lesions on Diffusion-Weighted Imaging
NeuroRadiol J 27:280-287, Finelli, P. & Foxman, E.B., 2014
Progressive Multifocal Leukoencephalopathy and Relapsing-Remitting Multiple Sclerosis: A Comparative Study
Arch Neurol 66:593-599, Boster,A.,et al, 2009