RT Journal Article SR Electronic T1 Current gastroenterology JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 683 OP 683 DO 10.1136/gut.24.7.683-a VO 24 IS 7 A1 Turnberg, L A YR 1983 UL http://gut.bmj.com/content/24/7/683.2.abstract AB