title: X-ray "surface" double contrast examination of the stomach.
mesh_terms: D001466:Barium Sulfate; D001639:Bicarbonates; D002951:Citrates; D005934:Glucagon; D006801:Humans; D008722:Methods; D011859:Radiography; D013270:Stomach / Q000000981:diagnostic imaging*
chemical_list: D001639:Bicarbonates; D002951:Citrates; D001466:Barium Sulfate; D005934:Glucagon