PT - JOURNAL ARTICLE AU - Ingoldby, C J H AU - Hall, R I AU - Mason, M K TI - Reply AID - 10.1136/gut.29.4.557 DP - 1988 Apr 01 TA - Gut PG - 557--557 VI - 29 IP - 4 4099 - http://gut.bmj.com/content/29/4/557.1.short 4100 - http://gut.bmj.com/content/29/4/557.1.full SO - Gut1988 Apr 01; 29