title: A controlled study: preoperative versus postoperative irradiation.
mesh_terms: D000368:Aged; D001943:Breast Neoplasms / Q000473:pathology / Q000532:radiotherapy* / Q000601:surgery; D005260:Female; D006801:Humans; D008197:Lymph Node Excision; D008408:Mastectomy; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local / Q000517:prevention & control; D011182:Postoperative Care; D011300:Preoperative Care; D013997:Time Factors