Comparison of the effects of a single injection of rhG-CSF and PEG-rHuMGDF on the recovery of peripheral blood cells in irradiated mice. One hour after irradiation at a dose of 3.5 Gy, mice were intravenously given 80 μg/kg PEG-rHuMGDF (•) or 10 (▵), 50 (▴), 250 (□), or 1,000 (▪) μg/kg rhG-CSF, or vehicle (○).