PEIR Digital Library

Welcome to the Pathology Education Informational Resource (PEIR) Digital Library, a multidisciplinary public access image database for use in medical education.

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00226815

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ENDOSCOPY: GASTROINTESTINAL: GI: ESOPHAGUS: ESOPHAGEAL RING; ESOPHAGUS, LOWER, MUCOSAL RING; A1NB ESOPHAGEAL RING,GERD,DYSPHAGIA