title: The 1982 A/S/G/E distinguished lecture: gastrointestinal endoscopy--20 years of progress.
mesh_terms: D004064:Digestive System; D019723:Endoscopes; D004724:Endoscopy / Q000266:history*; D005336:Fiber Optic Technology; D005773:Gastroscopy / Q000266:history; D049673:History, 20th Century