The effect of varying concentrations of dilazep on TF activity expression on monocytes stimulated with TNF. Peripheral blood mononuclear cells (monocytes plus lymphocytes) were treated for 5 hours with 1,000 U /mL TNF in the presence of varying concentrations of dilazep (0 to 100 μg/mL). TF activity on monocyte surface was determined as PCA as described in the Materials and Methods. The values represent the mean ± SD of four independent experiments.