title: Women's Health Initiative study.
mesh_terms: D001943:Breast Neoplasms / Q000209:etiology*; D015986:Confounding Factors, Epidemiologic; D015914:Estrogen Replacement Therapy / Q000009:adverse effects*; D004966:Estrogens, Conjugated (USP); D005260:Female; D006801:Humans; D017258:Medroxyprogesterone Acetate; D010352:Patient Dropouts; D016032:Randomized Controlled Trials as Topic; D016387:Women's Health
chemical_list: D004966:Estrogens, Conjugated (USP); D017258:Medroxyprogesterone Acetate