title: Letter: The barium enema and toxic megacolon: cause-effect relationship?
mesh_terms: D001466:Barium Sulfate / Q000009:adverse effects*; D003093:Colitis, Ulcerative / Q000000981:diagnostic imaging* / Q000209:etiology*; D003967:Diarrhea / Q000209:etiology; D004106:Dilatation; D006801:Humans; D008532:Megacolon, Toxic / Q000209:etiology*; D011859:Radiography
chemical_list: D001466:Barium Sulfate