Fig. 6
From: Effect of age and sex on immune checkpoint expression and kinetics in human T cells
Effect of sex on CD28, PD-1, VISTA and CD40L expression. Sex effects on IC expression were determined by flow cytometric staining of whole blood. Graphs show the frequencies of ICs in males and females within total CD4+ fractions (a), and total CD8+ T cells (b). Horizontal bars reflect median percentages. The Mann-Whitney U test was used for comparison between two groups. P-values are indicated in the graphs