RT Journal Article SR Electronic T1 Authors’ response JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 1179 OP 1179 VO 57 IS 8 A1 M J Blaser A1 Y Chen A1 J Reibman YR 2008 UL http://gut.bmj.com/content/57/8/1179.1.abstract AB