RT Journal Article SR Electronic T1 Ulcerative colitis presenting as pyrexia of unknown origin (PUO) without bowel symptoms JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 389 OP 390 DO 10.7861/clinmedicine.12-4-389 VO 12 IS 4 A1 Raya Shpilberg A1 Demetra Hadjiyiannis A1 SA Khan YR 2012 UL http://www.rcpjournals.org/content/12/4/389.abstract