Organization of clinical oncology in the U.S.A.: role of cancer centers, cooperative groups and community hospitals.
D002173:Cancer Care Facilities / Q000458:organization & administration*; D002986:Clinical Trials as Topic; D006764:Hospitals, Community / Q000706:statistics & numerical data*; D006782:Hospitals, Special / Q000458:organization & administration*; D006801:Humans; D008495:Medical Oncology; D012106:Research; D014481:United States; D014922:Wisconsin; D000078329:Workforce