PT - JOURNAL ARTICLE ED - , TI - Discussion III AID - 10.1136/gut.50.suppl_4.iv56 DP - 2002 May 01 TA - Gut PG - iv56--iv57 VI - 50 IP - suppl 4 4099 - http://gut.bmj.com/content/50/suppl_4/iv56.short 4100 - http://gut.bmj.com/content/50/suppl_4/iv56.full SO - Gut2002 May 01; 50