title: Preoperative radiotherapy of breast cancer.
mesh_terms: D000328:Adult; D000368:Aged; D001943:Breast Neoplasms / Q000401:mortality / Q000532:radiotherapy* / Q000601:surgery; D003037:Cobalt Radioisotopes; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008408:Mastectomy; D008875:Middle Aged; D011832:Radiation Injuries; D011878:Radiotherapy / Q000009:adverse effects
chemical_list: D003037:Cobalt Radioisotopes