Haemostasis treatment using dual red imaging during endoscopic submucosal dissection: a multicentre, open-label, randomised controlled trial by Ai Fujimoto, Yutaka Saito, Seiirhicro Abe, Shu Hoteya, Kosuke Nomura, Hiroshi Yasuda, Yasumasa Matsuo, Shiko Kuribayashi, Itaru Saito, Yosuke Tsuji, Tadateru Maehata, Yasutoshi Ochiai, Toshihiro Nishizawa, Naohisa Yahagi