Endoscopy in the diagnosis of gastrointestinal disorders.
D000328:Adult; D001466:Barium Sulfate; D004724:Endoscopy; D005767:Gastrointestinal Diseases / Q000175:diagnosis* / Q000000981:diagnostic imaging; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis; D006801:Humans; D008875:Middle Aged; D011859:Radiography
D001466:Barium Sulfate