MUC5AC and idiopathic pulmonary fibrosis: The results from Fig. 5 showed negative correlations between CTD-2528L19.6 and IPF cell markers KRT5 (r = −0.51, P = 0.036, Fig. 5A), NGFR (r = −0.57, P = 0.018, Fig. 5B), and strong negative correlations between CTD-2528L19.6 and IPF cell markers MUC5AC (r = −0.75, P = 4.94E-4, Fig. 5C), MUC5B (r = −0.76, P = 4.41E-4, Fig. 5D), SCGB1A1 (r = −0.65, P = 4.69E-3, Fig. 5E) and SPDEF (r = −0.64, P = 6.12E-3, Fig. 5F) in IPF patients.