Long-term survival (>6 months) of lethally irradiated and transplanted recipients was calculated using Kaplan-Meier estimates. B10 mice received 1 × 10⁶ to 5 × 10⁶ PBMC from B10.BR donors treated with FL alone, G-CSF alone, or FL + G-CSF (n ≥ 6 per group). Controls were transplanted with similar numbers of PBMC from untreated donors or 1 × 10⁶ bone marrow cells. Survival between different groups was compared using the Wilcoxon test, and significant differences are marked (* P < .0001). The follow-up ranged from 3 to 6 months.