RT Journal Article SR Electronic T1 Biliary endoprosthesis and common bile duct stones. JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 574 OP 575 DO 10.1136/gut.34.4.574-b VO 34 IS 4 A1 P B Cotton YR 1993 UL http://gut.bmj.com/content/34/4/574.3.abstract AB