Li et al. [99], in their case-control association study, concluded that except for the SNP rs27510, which was significantly correlated with onset age in patients with axSpA, none of the examined ERAP1 SNPs showed significant association with the demographic and clinical measurements of axSpA (age, sex, family history, onset site, dactylitis, peripheral arthritis, hip joint involvement, iritis, enthesitis, ESR, and CRP). Here, ERAP1 is linked to enthesitis.