As it turns out, the baseline serum CCL17 is significantly associated with AE in UIP patients, and the strength of the association is similar to that in patients including all histological patterns (UIP pattern, AUC = 0.74, p = 0.035 vs. all histological patterns, AUC = 0.77, p = 0.002) (Figure 1A). The gene discussed is CCL17; the disease is idiopathic pulmonary fibrosis.