title: Quality assurance of radiotherapy in clinical trials.
mesh_terms: D002986:Clinical Trials as Topic / Q000592:standards*; D004282:Documentation / Q000592:standards; D004307:Dose-Response Relationship, Radiation; D006801:Humans; D009369:Neoplasms / Q000532:radiotherapy*; D011786:Quality Control; D011878:Radiotherapy / Q000592:standards*; D011879:Radiotherapy Dosage; D014481:United States