TY - JOUR T1 - Reply JF - Gut JO - Gut SP - 861 LP - 861 DO - 10.1136/gut.34.6.861-c VL - 34 IS - 6 AU - J Spencer Y1 - 1993/06/01 UR - http://gut.bmj.com/content/34/6/861.4.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -