title: Comparative diagnositc accuracy of barium meal and endoscopy.
mesh_terms: D000284:Administration, Oral; D001466:Barium Sulfate / Q000008:administration & dosage; D002986:Clinical Trials as Topic; D004724:Endoscopy; D006801:Humans; D011446:Prospective Studies
chemical_list: D001466:Barium Sulfate