A FEASIBILITY STUDY OF A NOVEL ENDOSCOPIC TECHNIQUE FOR DUODENAL TUMORS; PARTIAL SUBMUCOSAL INJECTION UNDERWATER EMR - Takatori, Y; Kato, M; Mizutani, M; Tsutsumi, K; Kiguchi, Y; Akimoto, T; Nakayama, A; Maehata, T; Yahagi, N (Endoscopy, 2020)