PT - JOURNAL ARTICLE AU - Grazia Grazzini AU - Marco Zappa AU - Stephen P Halloran TI - The Authors' reply AID - 10.1136/gut.2011.237479 DP - 2012 Jan 01 TA - Gut PG - 162--162 VI - 61 IP - 1 4099 - http://gut.bmj.com/content/61/1/162.2.short 4100 - http://gut.bmj.com/content/61/1/162.2.full SO - Gut2012 Jan 01; 61