Progressive Multifocal Leukoencephalopathy and Relapsing-Remitting Multiple Sclerosis: A Comparative StudyArch Neurol 66:593-599, Boster,A.,et al, 2009
Multiple Sclerosis and Magnetic Resonance ImagingArch Neurol 58:35-36, Racke,M.K.,et al, 2001