Platelets, white blood cells (WBC), and PCILp before and after treatment with leukemia-reactive CTL lines 1, 2, and 3. (A) Between days 80 and 90, 10 to 20 days after the infusion of CTL line 3, a rapid decrease of (•) platelets and (⧫) WBC was observed, followed by a gradual recovery. (B) A strong increase of PCILp frequencies in PBL from the patient was observed between days 70 and 90.