CF patients without NTM history had a significantly higher rate of CD4+/CD45RO+ cells than patients in the CF/MABSC group (Figure 1E), which we believe is a result of selection bias, as we only selected individuals who had CD3+ lymphoblast formation for these analyses, ruling out almost half of the individuals in the CF/NTM- group. This evidence concerns the gene CD4 and cystic fibrosis.