Mass screening for colorectal cancer sponsored by the National Cancer Institute.
D003110:Colonic Neoplasms / Q000517:prevention & control*; D006801:Humans; D008403:Mass Screening / Q000379:methods; D009316:National Institutes of Health (U.S.); D012004:Rectal Neoplasms / Q000517:prevention & control*; D014481:United States