SELF-EXPANDABLE METALLIC STENTS (SEMS) IN ESOPHAGEAL VARICES POST BAND ULCER REFRACTORY BLEEDING, A RETROSPECTIVE STUDY - Elbahr, O; Kamal, A; Alsebaey, A; Amin, M; Abassy, M; Edris, A; Nada, A; Sabry, A; el-Aleem Helal, A; Gad-Allah, AN; Abd Elaziz, M (Endoscopy, 2019)