Effect of G-CSF on granulocyte population and T-cell phenotype. B6 Ly-5^a mice were injected with G-CSF (100 μg/kg/d) or saline for 6 days. BM (n = 15 per group) and splenocytes (n = 20 per group) were harvested the day after the last injection. After lysis of red blood cells, cells were stained with specific Abs and analyzed by FACS. The results represent the mean ± SD from nine experiments. *P < .001 v control mice.