title: Progressive multifocal leukoencephalopathy: two cases with electron microscopic and viral studies.
mesh_terms: D000818:Animals; D006224:Cricetinae; D004660:Encephalitis / Q000473:pathology*; D005260:Female; D000882:Haplorhini; D006801:Humans; D051379:Mice; D008854:Microscopy, Electron; D008875:Middle Aged; D027383:Papillomaviridae; D027382:Polyomaviridae; D014776:Virus Cultivation