TY - JOUR T1 - Reply JF - Gut JO - Gut SP - 338 LP - 339 DO - 10.1136/gut.32.3.338-c VL - 32 IS - 3 AU - Ingvar Bjarnason AU - Michael Gumpel Y1 - 1991/03/01 UR - http://gut.bmj.com/content/32/3/338.4.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -