Endoscopic complete closure of duodenal mucosal defects using a clip with a looped thread after endoscopic resection - Kasuga, Kengo; Oda, Ichiro; Nonaka, Satoru; Abe, Seiichiro; Suzuki, Haruhisa; Uraoka, Toshio; Saito, Yutaka (Endoscopy, 2021)