title: A rationale for combined antiestrogen plus progestin administration in breast cancer.
mesh_terms: D001943:Breast Neoplasms / Q000188:drug therapy*; D004359:Drug Therapy, Combination; D005260:Female; D006801:Humans; D011374:Progesterone / Q000008:administration & dosage*; D011960:Receptors, Estrogen / Q000378:metabolism; D013629:Tamoxifen / Q000008:administration & dosage* / Q000378:metabolism
chemical_list: D011960:Receptors, Estrogen; D013629:Tamoxifen; D011374:Progesterone