RT Journal Article SR Electronic T1 Workshop on Ursodeoxycholic Acid JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 736 OP 736 DO 10.1136/gut.20.8.736 VO 20 IS 8 A1 A. Reuben YR 1979 UL http://gut.bmj.com/content/20/8/736.1.abstract AB