RT Journal Article SR Electronic T1 Gastroenterology JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 414 OP 417 DO 10.7861/clinmedicine.8-4-414 VO 8 IS 4 A1 Jonathan M Rhodes YR 2008 UL http://www.rcpjournals.org/content/8/4/414.abstract AB