Reconstitution of CD4+ subpopulations after stem cell transplantation.

Development of absolute numbers of CD4⁺ cells ●, CD4⁺CD45RA⁺ cells ×, and CD4⁺CD45R0⁺ cells ▴ up is shown to 400 days after transplantation. Findings in patients after HLA-identical transplantation (A), after HLA-nonidentical transplantation without conditioning (B), and after HLA-nonidentical transplantation with conditioning regimen (C).