Colorectal cancer--to screen or not to screen?
D002985:Clinical Protocols; D015179:Colorectal Neoplasms / Q000453:epidemiology / Q000517:prevention & control*; D003657:Decision Making; D006801:Humans; D008403:Mass Screening / Q000592:standards*; D009780:Occult Blood; D016134:Organizational Policy; D011314:Preventive Health Services / Q000592:standards*; D020694:Sigmoidoscopes; D012812:Sigmoidoscopy / Q000706:statistics & numerical data; D016896:Treatment Outcome; D014481:United States / Q000453:epidemiology; D014837:Voluntary Health Agencies