PT - JOURNAL ARTICLE ED - , TI - Audit AID - 10.1136/gut.33.1_Suppl.S31 DP - 1992 Jan 01 TA - Gut PG - S31--S31 VI - 33 IP - 1 Suppl 4099 - http://gut.bmj.com/content/33/1_Suppl/S31.short 4100 - http://gut.bmj.com/content/33/1_Suppl/S31.full SO - Gut1992 Jan 01; 33