CCL11 and chronic obstructive pulmonary disease: Interestingly, CCL11 showed a trend to decrease during AE-COPD (Fig. 5f), which did not attain statistical significance (stable, 79.7 ± 41.1 pg/mL vs. AE-COPD, 67.8 ± 56.7 pg/mL; mean ± SD; p = 0.052).