title: MS drug withdrawn from market.
mesh_terms: D000911:Antibodies, Monoclonal / Q000009:adverse effects*; D061067:Antibodies, Monoclonal, Humanized; D004335:Drug and Narcotic Control; D006801:Humans; D007968:Leukoencephalopathy, Progressive Multifocal / Q000139:chemically induced*; D009103:Multiple Sclerosis / Q000188:drug therapy*; D000069442:Natalizumab
chemical_list: D000911:Antibodies, Monoclonal; D061067:Antibodies, Monoclonal, Humanized; D000069442:Natalizumab