The haplotypes “AC” of the SFTPA1 (rs1059057 x rs4253527), OR = 13.19 (4.44–39.17) and “CA” of the SFTPB (rs1130866 x rs7316), OR = 13.19 (4.44–39.17), exhibited a dominant effect on increased HP risk (Figure 3, red arrows). This evidence concerns the gene SFTPB and hypersensitivity pneumonitis.