title: [Endoscopic studies of the upper segment of the gastrointestinal tract].
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D019723:Endoscopes; D004724:Endoscopy; D005260:Female; D005336:Fiber Optic Technology; D005767:Gastrointestinal Diseases / Q000175:diagnosis*; D006801:Humans; D008297:Male; D008875:Middle Aged
vernacular_title: Badania endoskopowe górnego odcinka przewodu pokarmowego.