RT Journal Article SR Electronic T1 Endoscopic assessment and management of biliary strictures JF Frontline Gastroenterology JO Frontline Gastroenterol FD BMJ Publishing Group Ltd SP 170 OP 175 DO 10.1136/flgastro-2015-100570 VO 7 IS 3 A1 M F Dawwas A1 K W Oppong A1 G J Webster YR 2016 UL http://fg.bmj.com/content/7/3/170.abstract AB