Complete closure of a large mucosal defect (100 mm) after gastric endoscopic submucosal dissection, using the "accordion fold" method - Ikenoyama, Yohei; Katsurahara, Masaki; Tanaka, Kyosuke; Nakamura, Misaki; Hamada, Yasuhiko; Horiki, Noriyuki; Nakagawa, Hayato (Endoscopy, 2022)