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Upper gastrointestinal endoscopy: a prospective randomized study comparing continuous supplemental oxygen via the nasal or oral route

Continuous Supplemental OxygenEndoscopic SurgeryMedicineGastroenterologyEus-guided GastroenterostomyProspective Randomized StudyEndoscopic Sinus SurgerySurgeryUpper Gastrointestinal SurgeryInterventional EndoscopyOral RouteAnesthesiology