Screening for colorectal cancer in a high risk population.
D001466:Barium Sulfate; D003110:Colonic Neoplasms / Q000517:prevention & control*; D003113:Colonoscopy; D004733:Enema; D006801:Humans; D008403:Mass Screening / Q000379:methods*; D012004:Rectal Neoplasms / Q000517:prevention & control*
D001466:Barium Sulfate