The following equipment was used: gastroscope (Q260J; Olympus, Tokyo, Japan), over-the-scope clip (OTSC) system and Twin Grasper (TG) forceps (Ovesco Endoscopy GmbH, Tübingen, Germany), hemoclips (HX-610–090L; Olympus), endoscopic variceal ligation device (MD-48720U; Sumius, Tokyo, Japan), loop cutter (FS-5L-1; Olympus), endoscopic knives [DualKnife (KD-650 L); Olympus and ITknife2 (KD-611 L); Olympus], hemostatic forceps (FD-410 LR; Olympus), glycerol for injection (Chugai Pharmaceutical Co., Ltd., Tokyo, Japan), carbon dioxide insufflation device (UCR; Olympus), and electrosurgical unit (VIO 300 D; Erbe Elektromedizin, Tübingen, Germany). The settings for EFTR were as follows: cut mode, Endocut I, effect 2, duration 3, interval 2 for mucosal incision; coagulation mode, Swift Coag, effect 3, 80 W for submucosal trimming and full-thickness resection; and Soft Coag, effect 6, 80 W for hemostasis.
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