RT Journal Article SR Electronic T1 Upper gastrointestinal bleeding in superior mesenteric vein thrombosis JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP e3 OP e3 DO 10.7861/clinmed.Let.20.2.5 VO 20 IS 2 A1 Yazan Haddadin A1 Dev Katarey A1 David Patch YR 2020 UL http://www.rcpjournals.org/content/20/2/e3.abstract