RT Journal Article SR Electronic T1 Upfront April 2013 JF Frontline Gastroenterology JO Frontline Gastroenterol FD BMJ Publishing Group Ltd SP 87 OP 87 DO 10.1136/flgastro-2013-100317 VO 4 IS 2 A1 Anton V Emmanuel YR 2013 UL http://fg.bmj.com/content/4/2/87.abstract AB