Levels of soluble Il-7R (sCD127, left figures) and IL-7 (right figures) in plasma from adults and children after HSCT. * = p < 0.05. Plasma was obtained at different time points after HSCT and examined for IL-7 and sIL-7R by ELISA. Median levels are marked with a bar. sIL-7R levels increased with time after HSCT (non-parametric Wilcoxon test). Differences in plasma from children: 2 months after aHSCT as compared to 1 month (p = 0.02), 3–4 months vs. 1 month (p = 0.04), 5–7 months vs. 1 month (p = 0.02) and 12–14 months vs. 1 month (p = 0.03).