TY - JOUR T1 - Reply JF - Gut JO - Gut SP - 1569 LP - 1569 DO - 10.1136/gut.32.12.1569-a VL - 32 IS - 12 AU - J A Snook AU - D P Jewell Y1 - 1991/12/01 UR - http://gut.bmj.com/content/32/12/1569.2.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -