title: Barium meals and endoscopy.
mesh_terms: D001466:Barium Sulfate; D004724:Endoscopy; D005767:Gastrointestinal Diseases / Q000175:diagnosis* / Q000000981:diagnostic imaging; D006801:Humans; D011859:Radiography; D012107:Research Design
chemical_list: D001466:Barium Sulfate