TY - JOUR T1 - FRIDAY 7TH APRIL JF - Gut JO - Gut SP - A50 LP - A71 DO - 10.1136/gut.36.Suppl_1.A50 VL - 36 IS - Suppl 1 A2 - , Y1 - 1995/01/01 UR - http://gut.bmj.com/content/36/Suppl_1/A50.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -