[Early detection of colorectal tumors in high-risk groups].
D000328:Adult; D000368:Aged; D003110:Colonic Neoplasms / Q000175:diagnosis*; D004724:Endoscopy; D006801:Humans; D008875:Middle Aged; D009780:Occult Blood; D010865:Pilot Projects; D012004:Rectal Neoplasms / Q000175:diagnosis*; D012306:Risk