NCI offering computer database on cancer research.
D002170:Canada; D002173:Cancer Care Facilities; D002986:Clinical Trials as Topic; D004181:Directories as Topic; D006801:Humans; D008523:MEDLARS; D009316:National Institutes of Health (U.S.); D009369:Neoplasms / Q000628:therapy*; D009862:Online Systems; D010820:Physicians; D012106:Research; D014481:United States