Gastro-intestinal endoscopy--2. Oesophago-gastro-duodenoscopy.
D004378:Duodenal Diseases / Q000175:diagnosis; D004724:Endoscopy; D004945:Esophagoscopy; D005767:Gastrointestinal Diseases / Q000175:diagnosis*; D005773:Gastroscopy; D006801:Humans