Hematological values of animals subjected to TBI. Rabbits were given no growth factors (◊), G-CSF (▵), FLT-3 ligand (□), and FLT-3 ligand with G-CSF (•). For experimental details, see Animals and Methods. Differences in hematological values at nadir between the control and the FLT-3 ligand with G-CSF–treated animals were significant (P ≤ .05, see text).