SFTPA1 and idiopathic pulmonary fibrosis: Haplotype analysis showed that three haplotypes TG (rs1059047 x rs1136450), GA (rs1136450 x rs1136451) and GG (rs1136451 x rs1059057) of the SFTPA1 were associated with increased risk of IPF (OR=2.372, p=0.004, OR=2.368, p=0.004 and OR=2.265, p=0.004, respectively) and all exhibited a dominant effect (Table 6 and Figure 1).