Ethnic differences in occurrence of rectal polyposis in over 6,000 proctoscopies.
D000328:Adult; D005006:Ethnicity; D005260:Female; D006801:Humans; D007417:Intestinal Polyps / Q000453:epidemiology*; D007585:Jews; D008297:Male; D008800:Mexico; D011351:Proctoscopy; D012004:Rectal Neoplasms / Q000453:epidemiology*; D012812:Sigmoidoscopy; D013781:Texas