Intensity of spontaneous apoptosis measured 19-23 days after transplantation following 24-hour culture and the absolute number of peripheral blood T cells at days 75-91 among 28 patients.

(A) Apoptosis among CD4⁺ cells and absolute CD4⁺ T-cell count (R² = 25.7%,P = .006). (B) Apoptosis among CD8⁺ cells and absolute CD8⁺ T-cell count (R² = 0.7%,P = .671).