title: Endoscopy and radiology in the investigation of the upper gastrointestinal tract.
mesh_terms: D004064:Digestive System / Q000000981:diagnostic imaging; D004415:Dyspepsia / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000209:etiology; D005773:Gastroscopy; D006801:Humans; D011859:Radiography