title: Single- or double-contrast barium enemas: another opinion.
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D001466:Barium Sulfate; D003110:Colonic Neoplasms / Q000000981:diagnostic imaging; D003287:Contrast Media; D004733:Enema; D005471:Fluoroscopy; D006801:Humans; D007417:Intestinal Polyps / Q000000981:diagnostic imaging; D008722:Methods; D010173:Palpation
chemical_list: D003287:Contrast Media; D001466:Barium Sulfate