Flexible guide for peroral endoscopy.
D000368:Aged; D002648:Child; D020698:Duodenoscopes; D004384:Duodenoscopy / Q000379:methods; D019723:Endoscopes; D004724:Endoscopy / Q000379:methods; D004935:Esophageal Diseases / Q000175:diagnosis; D005767:Gastrointestinal Diseases / Q000175:diagnosis*; D006801:Humans