title: Tamoxifen approved for node-negative breast cancer patients.
mesh_terms: D001943:Breast Neoplasms / Q000737:chemistry / Q000188:drug therapy*; D003131:Combined Modality Therapy; D005260:Female; D006801:Humans; D008198:Lymph Nodes / Q000473:pathology; D008875:Middle Aged; D011379:Prognosis; D011960:Receptors, Estrogen / Q000032:analysis; D013629:Tamoxifen / Q000627:therapeutic use*
chemical_list: D011960:Receptors, Estrogen; D013629:Tamoxifen