TY - JOUR T1 - Reply JF - Gut JO - Gut SP - 575 LP - 575 DO - 10.1136/gut.34.4.575-b VL - 34 IS - 4 AU - S Y Iftikhar AU - R J C Steele AU - S Watson AU - P D James Y1 - 1993/04/01 UR - http://gut.bmj.com/content/34/4/575.3.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -