Venn diagram showing the number of differentially regulated genes in blood (fold change +/−1.5 and p<0.01) between frequent exacerbators (F), the intermediate group (I), and zero exacerbators (Z); for example, F vs I denotes number of differentially regulated genes between frequent exacerbators and the intermediate group.

<p>Venn diagram showing the number of differentially regulated genes in blood (fold change +/−1.5 and p<0.01) between frequent exacerbators (F), the intermediate group (I), and zero exacerbators (Z); for example, F vs I denotes number of differentially regulated genes between frequent exacerbators and the intermediate group.