[Early detection of colon carcinoma. Flexible sigmoidoscopy--who does it?].
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D003110:Colonic Neoplasms / Q000175:diagnosis* / Q000517:prevention & control; D005194:Family Practice; D005858:Germany; D006801:Humans; D008403:Mass Screening; D011230:Precancerous Conditions / Q000175:diagnosis* / Q000517:prevention & control; D015203:Reproducibility of Results; D012812:Sigmoidoscopy