title: Gastrointestinal hemorrhage. Comparative values of double-contrast upper gastrointestinal radiology and endoscopy.
mesh_terms: D000208:Acute Disease; D000328:Adult; D000368:Aged; D003287:Contrast Media / Q000008:administration & dosage; D004064:Digestive System / Q000000981:diagnostic imaging* / Q000293:injuries; D019723:Endoscopes; D005336:Fiber Optic Technology; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis / Q000000981:diagnostic imaging* / Q000209:etiology; D006801:Humans; D008722:Methods; D008875:Middle Aged; D011859:Radiography
chemical_list: D003287:Contrast Media