TY - JOUR T1 - News JF - Gut JO - Gut SP - 1552 LP - 1552 DO - 10.1136/gut.28.11.1552-a VL - 28 IS - 11 A2 - , Y1 - 1987/11/01 UR - http://gut.bmj.com/content/28/11/1552.2.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -