TY - JOUR T1 - Reply JF - Gut JO - Gut SP - 1027 LP - 1027 DO - 10.1136/gut.30.7.1027-a VL - 30 IS - 7 AU - D B A Silk Y1 - 1989/07/01 UR - http://gut.bmj.com/content/30/7/1027.2.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -