CCL28 and lung adenocarcinoma: Interestingly, CCL28 expression was also much higher in the blood serum of lung adenocarcinoma patients, compared to that in the serum of healthy donors (5009.10 ± 504.76ng/ml vs. 902.27 ± 221.50 ng/ml, p < 0.001) (Fig. 1F and Supplementary Table 2).