title: A survey of double contrast barium enemas at Bristol Royal Infirmary.
mesh_terms: D001466:Barium Sulfate; D003106:Colon / Q000000981:diagnostic imaging; D003287:Contrast Media; D004733:Enema / Q000379:methods*; D005243:Feces; D006801:Humans; D007413:Intestinal Mucosa / Q000000981:diagnostic imaging; D011859:Radiography
chemical_list: D003287:Contrast Media; D001466:Barium Sulfate