Endoscopic closure using polyglycolic acid sheets for delayed perforation after colonic endoscopic submucosal dissection - Nagami, Yasuaki; Fukunaga, Shusei; Kanamori, Atsushi; Sakai, Taishi; Ominami, Masaki; Watanabe, Toshio; Fujiwara, Yasuhiro (Endoscopy, 2020)