PT - JOURNAL ARTICLE AU - Weller, I V D AU - Axon, A T R AU - Jeffries, D J TI - Reply AID - 10.1136/gut.30.8.1156-a DP - 1989 Aug 01 TA - Gut PG - 1156--1157 VI - 30 IP - 8 4099 - http://gut.bmj.com/content/30/8/1156.2.short 4100 - http://gut.bmj.com/content/30/8/1156.2.full SO - Gut1989 Aug 01; 30