title: ASTR: friends and relations. American Society of Therapeutic Radiologists 1977 Presidental Address.
mesh_terms: D006801:Humans; D009316:National Institutes of Health (U.S.); D009369:Neoplasms / Q000532:radiotherapy; D011871:Radiology; D012106:Research; D012955:Societies, Medical; D014481:United States