title: A review of 600 upper gastrointestinal endoscopy.
mesh_terms: D000328:Adult; D000368:Aged; D004064:Digestive System; D004724:Endoscopy; D005260:Female; D005767:Gastrointestinal Diseases / Q000175:diagnosis*; D006801:Humans; D008297:Male; D008875:Middle Aged