Peripheral WBC and analysis of CFC for the 5 normal primates (mean ± SEM) administered Flt3-L and G-CSF. These growth factors were administered for 7 days (days 0-6) before apheresis on day 6. One animal was lost to the study after the apheresis and 2 animals continued to receive these growth factors for 3 additional days (days 7-9). Because the kinetics of changes in WBC and CFC did not differ in the animals receiving the additional days of growth factors, the data shown at each day are pooled from all the animals available for analysis on that day.