<p>Mice were treated with ip injection of vehicle (V), SB 203580 (SB), G-CSF (CSF), or both (C+S) after exposure to 6Gy TBI as described in the Methods. A group of sham-irradiated control mice was included as a control (Ctr). Blood were collected after the mice were euthanized 30 days after 6Gy TBI to count various blood cells. The data are expressed as mean± SD. a, <i>p</i><0.05, vs. Ctr; b, <i>p</i><0.05, vs. V; c, <i>p</i><0.05, vs. CSF; d, <i>p</i><0.05, vs. SB.</p