TY - JOUR T1 - Reply JF - Gut JO - Gut SP - 425 LP - 425 DO - 10.1136/gut.33.3.425 VL - 33 IS - 3 AU - D G Maxton AU - J A Morris AU - P J Whorwell Y1 - 1992/03/01 UR - http://gut.bmj.com/content/33/3/425.1.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -