title: Femara approved as first-line breast cancer therapy.
mesh_terms: D000970:Antineoplastic Agents / Q000627:therapeutic use*; D001943:Breast Neoplasms / Q000188:drug therapy*; D017277:Drug Approval; D005260:Female; D006801:Humans; D000077289:Letrozole; D009570:Nitriles / Q000627:therapeutic use*; D014230:Triazoles / Q000627:therapeutic use*; D014481:United States; D014486:United States Food and Drug Administration
chemical_list: D000970:Antineoplastic Agents; D009570:Nitriles; D014230:Triazoles; D000077289:Letrozole