Response of CD34⁺ cells to cytokines in single-cell culture at day 6. Individual CD34⁺ cells were deposited into Terasaki plate wells containing 10 μL of SDM alone, SDM supplemented with SCF (100 ng/mL), or SDM supplemented with 4HGF. The number of cells in each well was enumerated after 6 days and plotted in quartiles for CML and normal CD34⁺ cells.