title: Progressive multifocal leukoencephalopathy: clinical pathological correlates and failure of a drug trial in two patients.
mesh_terms: D000368:Aged; D004341:Drug Evaluation; D006801:Humans; D007968:Leukoencephalopathy, Progressive Multifocal / Q000188:drug therapy* / Q000473:pathology / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D014740:Vidarabine / Q000627:therapeutic use*
chemical_list: D014740:Vidarabine