Use of a detachable snare with polyglycolic acid sheets in a simple and novel shielding method for post-endoscopic submucosal dissection ulcers - Kimoto, Yoshiaki; Ohata, Ken; Sakai, Eiji; Ohno, Akiko; Ito, Takafumi; Tsuji, Yosuke; Chiba, Hideyuki (Endoscopy, 2021)