Therapeutic endoscopy of the upper gastrointestinal tract.
D003680:Deglutition Disorders / Q000628:therapy; D004384:Duodenoscopy; D004724:Endoscopy; D004932:Esophageal and Gastric Varices / Q000628:therapy; D004945:Esophagoscopy; D005767:Gastrointestinal Diseases / Q000628:therapy*; D005773:Gastroscopy; D006801:Humans