RT Journal Article SR Electronic T1 Prostaglandins and the Gut JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 546 OP 546 DO 10.1136/gut.20.6.546 VO 20 IS 6 A1 Harries, John YR 1979 UL http://gut.bmj.com/content/20/6/546.1.abstract AB