Effects of stress on the percentages of lymphoid cell subsets in peripheral blood. A – Lymphoid, T and B cells. B – T cell subsets (CD3+, CD4+ and CD8+). C – PNA+ and PNA+CD3+ cells. The experiment was done 3 times using 3 ≤ n ≤ 5 mice per group. Data for one representative experiment of the 3 are shown.