Frequency and activation/memory phenotypes of CD8+ T cells in peripheral blood. A, Frequency (%) and absolute numbers of CD8+ T cells in PBLs assessed from pediatric Tx patients and HCs. B, Dot plots presenting the CD8+ TN (naive), TCM, TEMRA, and TEM, and total percentage of CD8+ T cells with CD45RA−CD62L− (TEM) phenotype analyzed in PBLs from pediatric Tx patients and HCs. C, CD8+ T cell expression of CD38, PD-1, CD127, and CTLA-4 in PBLs from pediatric Tx patients and HCs. *p ≤ 0.05, one-tailed t test.