title: Sisters of women with breast cancer wanted for study.
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D001943:Breast Neoplasms / Q000209:etiology* / Q000235:genetics; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008875:Middle Aged; D035781:Siblings