Figure 1. Host age does not affect survival outcome. To determine the impact of host age on survival, 1 x 105 cells of a characterized B-ALL cell line Ba/F3-p190 (REF) were IV injected into syngeneic host mice aged 4 months (n = 16) or 20 months (n = 11). Kaplan-Meier survival plot demonstrates no difference in survival (log rank test P = 0.9011).