RT Journal Article SR Electronic T1 Histological Typing of Tumours of the Gallbladder and Extrahepatic Bile Ducts JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 792 OP 792 DO 10.1136/jcp.44.9.792-a VO 44 IS 9 A1 Hopwood, D YR 1991 UL http://jcp.bmj.com/content/44/9/792.1.abstract AB