[Shortcomings of electronic endoscopy. a. Endoscopy of the upper digestive tract].
D003626:Data Display; D004384:Duodenoscopy / Q000379:methods; D004945:Esophagoscopy / Q000379:methods*; D005773:Gastroscopy / Q000379:methods*; D006801:Humans; D007091:Image Processing, Computer-Assisted