PT - JOURNAL ARTICLE ED - , TI - Discussion II AID - 10.1136/gut.50.suppl_4.iv31 DP - 2002 May 01 TA - Gut PG - iv31--iv32 VI - 50 IP - suppl 4 4099 - http://gut.bmj.com/content/50/suppl_4/iv31.short 4100 - http://gut.bmj.com/content/50/suppl_4/iv31.full SO - Gut2002 May 01; 50