Numbers of thymocytes, fibroblasts, ECs, and TECs inAregFl/FlFoxp3YFP-crecompared withAregFl/Flmice on day 7 after injury, (n= 16 per time point, three repeats). AREG, amphireguin; DN, double negative; DP, double positive; H&E, hematoxylin and eosin; SL-TBI, sublethal total body irradiation; SP, single positive; TEC, thymic epithelial cell. Graphs represent mean ± SD.∗p< 0.05,∗∗p< 0.01,∗∗∗p< 0.001, ns = not significant.