title: Caring for older women with breast cancer: can observational research fill the clinical trial gap?
authors.forename: Bruce E
authors.initials: BE
authors.lastname: Hillner
authors.forename: Jeanne
authors.initials: J
authors.lastname: Mandelblatt
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001943:Breast Neoplasms / Q000517:prevention & control* / Q000532:radiotherapy* / Q000601:surgery; D015897:Comorbidity; D005260:Female; D006801:Humans; D015412:Mastectomy, Segmental; D006278:Medicare; D009364:Neoplasm Recurrence, Local / Q000517:prevention & control*; D019370:Observation; D018714:Radiotherapy, Adjuvant; D018426:SEER Program; D014481:United States