Epidemiology of breast cancer.
D000328:Adult; D000367:Age Factors; D000368:Aged; D001943:Breast Neoplasms / Q000453:epidemiology* / Q000209:etiology / Q000235:genetics; D004777:Environment; D004812:Epidemiologic Methods; D004964:Estriol / Q000502:physiology; D005006:Ethnicity; D005260:Female; D006801:Humans; D008423:Maternal Age; D008875:Middle Aged; D011247:Pregnancy
D004964:Estriol