title: Progressive multifocal leukoencephalopathy and natalizumab--unforeseen consequences.
authors.forename: Joseph R
authors.initials: JR
authors.lastname: Berger
authors.forename: Igor J
authors.initials: IJ
authors.lastname: Koralnik
mesh_terms: D000911:Antibodies, Monoclonal / Q000009:adverse effects* / Q000494:pharmacology; D061067:Antibodies, Monoclonal, Humanized; D001921:Brain / Q000473:pathology; D003424:Crohn Disease / Q000188:drug therapy; D018450:Disease Progression; D006801:Humans; D007577:JC Virus; D007968:Leukoencephalopathy, Progressive Multifocal / Q000139:chemically induced*; D020529:Multiple Sclerosis, Relapsing-Remitting / Q000188:drug therapy; D000069442:Natalizumab; D009894:Opportunistic Infections / Q000139:chemically induced
chemical_list: D000911:Antibodies, Monoclonal; D061067:Antibodies, Monoclonal, Humanized; D000069442:Natalizumab