RT Journal Article SR Electronic T1 ERCP training—time for change JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 459 OP 460 DO 10.1136/gut.47.4.459 VO 47 IS 4 A1 M D HELLIER A1 A I MORRIS YR 2000 UL http://gut.bmj.com/content/47/4/459.abstract AB