The clinical application of fiberoptic gastrointestinal endoscopy.
D004935:Esophageal Diseases / Q000175:diagnosis*; D004945:Esophagoscopy; D005336:Fiber Optic Technology; D005773:Gastroscopy; D006801:Humans; D011446:Prospective Studies; D012189:Retrospective Studies; D013272:Stomach Diseases / Q000175:diagnosis*