AIMS (1) To investigate the immunohistochemical expression of the multidrug resistance gene (MDR1) product P-glycoprotein in histological samples from 31 hepatocellular carcinomas (HCCs); and (2) to correlate the results with cell proliferation, p53 expression, the disease-free interval, and cumulative patient survival. METHODS C219 (a monoclonal antibody), CM-1 (a polyclonal rabbit anti-huma...