Dose-response of the cytotoxic effect of salicylate on B-CLL cells. Cells from 5 patients were incubated for 48 hours with various concentrations of sodium salicylate as indicated. Cell viability was determined by the MTT assay as described in the Materials and Methods and is expressed as a percentage of the viability of control cells at the beginning of the culture. Data are shown as the mean value ± SD of 3 independent experiments.