PT - JOURNAL ARTICLE ED - , TI - Chronic Duodenal Ulcer AID - 10.1136/gut.16.3.248 DP - 1975 Mar 01 TA - Gut PG - 248--248 VI - 16 IP - 3 4099 - http://gut.bmj.com/content/16/3/248.short 4100 - http://gut.bmj.com/content/16/3/248.full SO - Gut1975 Mar 01; 16