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2. Esophageal perforation;Hardin;Surg Gynecol Obstet,1967
3. Esophageal dilatation. A new method adapted to the fiberoptic esophagoscope;Lilley;Dig Dis,1971
4. Esophageal dilatation using the Eder-Puestow dilators;Royston;Am J Surg,1976
5. A new and safe system for esophageal dilatation;Celestin;Lancet,1981