title: Breast cancer: risk factors and etiology.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D001943:Breast Neoplasms / Q000453:epidemiology / Q000209:etiology*; D004967:Estrogens / Q000502:physiology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012306:Risk; D012737:Sex Factors
chemical_list: D004967:Estrogens