title: Trends in radiation therapy demographics--1974 to 1983.
mesh_terms: D003625:Data Collection; D006748:Hospital Departments / Q000600:supply & distribution*; D011871:Radiology; D011872:Radiology Department, Hospital / Q000706:statistics & numerical data / Q000600:supply & distribution*; D011882:Radiotherapy, High-Energy / Q000295:instrumentation*; D014481:United States; D000078329:Workforce