TY - JOUR T1 - Reply JF - Gut JO - Gut SP - 694 LP - 694 DO - 10.1136/gut.29.5.694 VL - 29 IS - 5 AU - P J Guillou Y1 - 1988/05/01 UR - http://gut.bmj.com/content/29/5/694.1.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -