Effective use of image-enhanced endoscopy and endoscopic submucosal dissection for multiple flat non-polypoid colorectal neoplasms - Uozumi, Takeshi; Saito, Yutaka; Toyoshima, Naoya; Takamaru, Hiroyuki; Sekiguchi, Masau; Yamada, Masayoshi; Abe, Seiichiro (Endoscopy, 2022)