title: Should colorectal carcinoma be sought in periodic health examinations?--an approach to the evidence.
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D003110:Colonic Neoplasms / Q000175:diagnosis* / Q000628:therapy; D006801:Humans; D008875:Middle Aged; D009780:Occult Blood; D010808:Physical Examination; D012004:Rectal Neoplasms / Q000175:diagnosis* / Q000628:therapy; D012812:Sigmoidoscopy