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Chronological endoscopic findings at 2 weeks and 3 weeks after esophageal endoscopic submucosal dissection (ESD). The two control pigs developed severe esophageal strictures at 3 weeks after ESD. The two pigs that underwent endoscopic balloon dilatation (EBD) alone developed re-strictures at 1 week after EBD, whereas the two pigs that underwent epidermal cell sheet (ECS) transplantation after EBD did not.
