RT Journal Article SR Electronic T1 UDCA, PBC and biochemistry: what does normal mean? JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 8 OP 8 DO 10.1136/gut.46.1.8 VO 46 IS 1 A1 K D LINDOR YR 2000 UL http://gut.bmj.com/content/46/1/8.abstract AB