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G-POEM procedure. A Injection. B Submucosal tunnel was established. C A white thick pyloric band was in contrast to a thin-walled submucosal space of the duodenum. D Dissection of the pyloric ring exposing muscular layer underneath. E Circular and longitudinal myotomy for 2–3 cm. F Serosa indicates appropriate depth of myotomy. G Reevaluation of the mucosotomy site. H Mucosal entry was closed with clips from distal mucosal incision point
