Epidermal growth factor receptor and HER-2/neu status by immunohistochemistry and fluorescence in situ hybridization in adenocarcinomas of the biliary tree and gallbladder
a Department of Pathology, University of California, San Francisco, CA 94121, USA b Veteran Affairs Medical Center, San Francisco, CA 94121, USA c Department of Medicine, Mercy Hospital, Pittsburgh, PA 94143, USA