RT Journal Article SR Electronic T1 The significance of the gut barrier in disease JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 438 OP 440 DO 10.1136/gut.2007.143172 VO 57 IS 4 A1 Meddings, Jon YR 2008 UL http://gut.bmj.com/content/57/4/438.abstract AB