Comparison of graft failure rates after syngeneic or allogeneic MHC-matched PBPCT. Recipients were Balb/c mice and donors were Balb/c or DBA/2 mice, respectively. Donors were pretreated by 2 × 5/μg Filgastrim subcutaneously for 5 consecutive days before stem cell harvest. Experiments were performed in a head-to-head manner with six repeated single experiments. The total number of animals in each group ranges from 8 to 27.