[Survey on case-control in colon cancer].
D003110:Colonic Neoplasms / Q000209:etiology*; D004032:Diet; D004812:Epidemiologic Methods; D005260:Female; D006801:Humans; D008297:Male; D012004:Rectal Neoplasms / Q000209:etiology*; D012306:Risk; D011795:Surveys and Questionnaires; D014881:Water Supply