title: Once lost, gone forever.
authors: Bruce J
authors: BJ
authors: Hillman
mesh_terms: D035843:Biomedical Research; D002986:Clinical Trials as Topic; D006801:Humans; D054547:National Cancer Institute (U.S.); D009369:Neoplasms / Q000175:diagnosis* / Q000532:radiotherapy*; D009936:Organizational Innovation; D009937:Organizational Objectives; D011871:Radiology; D012109:Research Support as Topic; D012955:Societies, Medical; D013673:Technology Assessment, Biomedical; D014481:United States