Fig. 1.

Tobacco smoking-dependent frequency of GPR15+ cells among lymphocyte populations in blood of patients with lung diseases. Frequency of GPR15+ cells are highly specific increased in former and current smokers in T cells. Box plots illustrates median, 25% and 75% percentile, non-outlier max and – min, outlier (circle) and extremes (triangle). Number of patients is enclosed in parenthesis. **, ***; p-value of significance <0.01, 0.001 of difference toward never smoker applying Kruskal-Wallis test