Intermittent antiestrogen therapy in advanced breast cancer.
D000368:Aged; D001943:Breast Neoplasms / Q000188:drug therapy*; D005260:Female; D006801:Humans; D008408:Mastectomy; D009364:Neoplasm Recurrence, Local; D013629:Tamoxifen / Q000627:therapeutic use*
D013629:Tamoxifen