Survival of nonleukemic Balb/c mice after TBI only (n = 12), transfer of 1 × 10⁹ syngeneic PBPCs/kg BW (n = 10), and transfer of the same dose of unmanipulated allogeneic PBPC (n = 16) or CD3-depleted allogeneic PBPCs (n = 16). T-cell depletion was performed by immunomagnetic removal of these cells by anti-CD3–coated magnetic beads, resulting in less than 1% CD3⁺ cells as shown by flow cytometry.