RT Journal Article SR Electronic T1 Author's response JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 859 OP 860 DO 10.1136/gut.2009.199554 VO 59 IS 6 A1 Reinhild Klein YR 2010 UL http://gut.bmj.com/content/59/6/859.2.abstract AB