RT Journal Article SR Electronic T1 Managing acute upper gastrointestinal bleeding in the acute assessment unit JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 589 OP 593 DO 10.7861/clinmedicine.12-6-589 VO 12 IS 6 A1 Lotte Dinesen A1 Martin Benson YR 2012 UL http://www.rcpjournals.org/content/12/6/589.abstract