PT - JOURNAL ARTICLE AU - Emad El-Omar AU - William Grady AU - Alexander Gerbes TI - Digest AID - 10.1136/gut.2011.238311 DP - 2011 Mar 01 TA - Gut PG - i--ii VI - 60 IP - 3 4099 - http://gut.bmj.com/content/60/3/i.short 4100 - http://gut.bmj.com/content/60/3/i.full SO - Gut2011 Mar 01; 60