Jejunal Dieulafoy's lesion resembling subepithelial mass resulting in profound gastrointestinal hemorrhage - Thanaboon Chaemsupaphan; Tanawat Geeratragool; Napat Angkathunyakul; Arissa Phothisirisakulwong; Monthira Maneerattanaporn (Korean Society of Gastrointestinal Endoscopy, 2024)