The genetic association of genetic polymorphisms in MUC5B-MUC2-TOLLIP as well as TERT and TERC loci with high risk for pulmonary fibrosis has been confirmed by recent results from GWAS comparing 4683 controls and 1616 cases of fibrotic idiopathic interstitial pneumonias (IIP) including 77% of IPF cases with independent replication cohort (Fingerlin et al., 2013). Here, MUC5B is linked to idiopathic interstitial pneumonia.