Clinical trials and the consent of the patient.
D000368:Aged; D002986:Clinical Trials as Topic; D028744:Ethics Committees, Research; D004992:Ethics, Medical; D005260:Female; D005472:Fluorouracil / Q000009:adverse effects; D006801:Humans; D007258:Informed Consent; D012004:Rectal Neoplasms / Q000188:drug therapy; D006113:United Kingdom
D005472:Fluorouracil