title: X-ray negative dyspepsia.
mesh_terms: D001466:Barium Sulfate; D004415:Dyspepsia / Q000175:diagnosis / Q000000981:diagnostic imaging*; D004724:Endoscopy; D006801:Humans; D011859:Radiography; D014965:X-Rays
chemical_list: D001466:Barium Sulfate