title: Natalizumab (Tysabri) returns.
mesh_terms: D000911:Antibodies, Monoclonal / Q000009:adverse effects / Q000627:therapeutic use*; D061067:Antibodies, Monoclonal, Humanized; D001379:Azathioprine / Q000627:therapeutic use; D002986:Clinical Trials as Topic; D003424:Crohn Disease / Q000188:drug therapy; D004359:Drug Therapy, Combination; D006801:Humans; D016899:Interferon-beta / Q000627:therapeutic use; D007968:Leukoencephalopathy, Progressive Multifocal / Q000139:chemically induced; D009103:Multiple Sclerosis / Q000188:drug therapy; D020529:Multiple Sclerosis, Relapsing-Remitting / Q000188:drug therapy*; D000069442:Natalizumab; D011358:Product Surveillance, Postmarketing / Q000379:methods; D013997:Time Factors; D014481:United States; D014486:United States Food and Drug Administration / Q000331:legislation & jurisprudence / Q000592:standards
chemical_list: D000911:Antibodies, Monoclonal; D061067:Antibodies, Monoclonal, Humanized; D000069442:Natalizumab; D016899:Interferon-beta; D001379:Azathioprine