Correlation between the number of bcl-2/IgH rearranged cells predicted and observed. H2 (A), RL (B), and DHL-16 (C) cells in concentrations ranging from 5 to 5 × 10⁴ cells, were added to 10⁶ normal PBMC and then evaluated with the ICs (thick line): GU1M, MACM, and MD6, respectively. Results, mean ± SD of three experiments, are compared with an ideal line of identity (thin line). Correlation coefficients of observed versus predicted results were greater than .99 for all three ICs.