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Continue to ChatFeasibility of the trans-umbilical route compared with the trans-oral route in gastric upper body endoscopic submucosal dissection: A porcine model https://www.sages.org/meetings/annual-meeting/abstracts-archive/feasibility-of-the-trans-umbilical-route-compared-with-the-trans-oral-route-in-gastric-upper-body-endoscopic-submucosal-dissection-a-porcine-model/