TY - JOUR T1 - Current gastroenterology JF - Gut JO - Gut SP - 683 LP - 683 DO - 10.1136/gut.24.7.683-a VL - 24 IS - 7 AU - L A Turnberg Y1 - 1983/07/01 UR - http://gut.bmj.com/content/24/7/683.2.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -