title: Premenopausal and postmenopausal breast cancer: one disease or two?
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D001824:Body Constitution; D001943:Breast Neoplasms / Q000145:classification* / Q000453:epidemiology / Q000209:etiology; D004812:Epidemiologic Methods; D004967:Estrogens / Q000502:physiology; D005260:Female; D006801:Humans; D008593:Menopause; D008875:Middle Aged; D009747:Nutritional Physiological Phenomena; D009765:Obesity / Q000150:complications
chemical_list: D004967:Estrogens