Annexin-V on SKL cells mobilized by G-CSF or GRO. (A) Representative Annexin-V staining on mobilized SKL cells. (B) Fold change Annexin-V mean fluorescence intensity on KL or SKL cells, expressed as mean (± SEM) from 2 independent experiments performed in triplicate using 10 mice per group per experiment. *P < .01 compared with G-CSF and GROβΔ4.