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Upper gastrointestinal endoscopy without sedation: a prospective study of 2000 examination

EndoscopyEndoscopic SurgeryGastroenterologyEus-guided GastroenterostomyGi TechniqueSurgeryUpper Gastrointestinal EndoscopyColonoscopyProspective StudyInterventional EndoscopyUpper Gastrointestinal SurgeryMedicineAnesthesiology