The study of the patterns of cancer care in radiation therapy.
D006689:Hodgkin Disease / Q000532:radiotherapy; D006801:Humans; D009369:Neoplasms / Q000473:pathology / Q000532:radiotherapy*; D011787:Quality of Health Care; D011879:Radiotherapy Dosage; D011882:Radiotherapy, High-Energy; D012494:Sampling Studies; D014481:United States