Viral Infections of the Nervous System, Chronic Meningitis, and Prior Diseases, Progressive Multifocal Leukoencephalopathy
Adams & Victors Principles of Neurology, Chp 33, pg 767, Ropper, A.H.,et al, 2014
Clinical Presentation, Pathologic Features, and Diagnosis of Primary Central Nervous System Lymphoma
Up to Date Sept 2010, Hochberg,F.H.,et al, 2010