RT Journal Article SR Electronic T1 Positioning cholangioscopy in bile duct stone management: mind the technology gap JF Frontline Gastroenterology JO Frontline Gastroenterol FD BMJ Publishing Group Ltd SP flgastro-2018-100963 DO 10.1136/flgastro-2018-100963 A1 Vincent Zimmer A1 Frank Lammert YR 2018 UL http://fg.bmj.com/content/early/2018/03/09/flgastro-2018-100963.abstract AB