RT Journal Article SR Electronic T1 Hepatic metabolism of drugs. JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 579 OP 585 DO 10.1136/gut.13.7.579 VO 13 IS 7 A1 Williams, R T YR 1972 UL http://gut.bmj.com/content/13/7/579.abstract AB