Dissection of mucosa and muscularis mucosa instead of submucosal dissection: rapid retroflow of the injection fluid can be an indicator - Günay, Süleyman; SarıtaşYüksel, Elif; Topal, Firdevs; Paköz, Betül; Çekiç, Cem; Çamyar, Hakan; Vatansever, Sezgin (Endoscopy, 2020)