PT - JOURNAL ARTICLE ED - , TI - Abstracts AID - 10.1136/gut.37.Suppl_2_Pt_2.A241 DP - 1995 Jan 01 TA - Gut PG - A241--A257 VI - 37 IP - Suppl 2 Pt 2 4099 - http://gut.bmj.com/content/37/Suppl_2_Pt_2/A241.short 4100 - http://gut.bmj.com/content/37/Suppl_2_Pt_2/A241.full SO - Gut1995 Jan 01; 37