CD8A and ataxia telangiectasia: The lymphocyte counts in AT patients was significantly reduced as compared with the other groups (p = 0.0238, Lymphocyte AT vs Lymphocyte Atypical SCID, p = 0.0043, Lymphocyte AT vs Lymphocyte ICF1 and 0.0260 CD8+ cells AT vs CD8+ cell ICF1) (Table 2 and Fig. S1A,and E).