Mass screening for colorectal cancer.
D000293:Adolescent; D000328:Adult; D000368:Aged; D003110:Colonic Neoplasms / Q000517:prevention & control*; D004219:District of Columbia; D006801:Humans; D008403:Mass Screening / Q000379:methods*; D008875:Middle Aged; D012004:Rectal Neoplasms / Q000517:prevention & control*