TY - JOUR T1 - Clinics in gastroenterology 14:2 JF - Gut JO - Gut SP - 558 LP - 558 DO - 10.1136/gut.29.4.558-a VL - 29 IS - 4 AU - W R Lees Y1 - 1988/04/01 UR - http://gut.bmj.com/content/29/4/558.2.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -