Additionally, we confirmed seven previously reported associations with IPF susceptibility: the T allele of SNP rs35705950 in the MUC5B promoter (stage 1 p=1·86 × 10−37) was the strongest genetic risk factor for susceptibility to IPF with an OR of 4·11,50 then DSP (stage 1 p=4·14 × 10−12), MUC2 (stage 1 p=1·33 × 10−5), TOLLIP (stage 1 p=1·60 × 10−5), TERT (stage 1 p=8·25 × 10−5), DPP9 (stage 1 p=4·17 × 10−4), and FAM13A (stage 1 p=0·002). This evidence concerns the gene DPP9 and idiopathic pulmonary fibrosis.