RT Journal Article SR Electronic T1 A multicentre review of acute upper gastrointestinal bleeding; a raised urea:creatinine ratio aids diagnosis JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP s3 OP s4 DO 10.7861/clinmedicine.19-3s-s3 VO 19 IS Suppl 3 A1 Deevia Kotecha A1 Jason Mak A1 Neel Sharma A1 Ralph Boulton A1 Benjamin Disney A1 Neeraj Bhala A1 Ajay Verma YR 2019 UL http://www.rcpjournals.org/content/19/Suppl_3/s3.abstract