However, CCR1-CCR3, IL23R-IL12RB2, HLA-F-AS1–HLA-A, STAT4, and KLRC4-KLRK1 did not show significant associations with any BD subtypes in our study, which might be due to the limited sample size or differences in ethnic background effects on disease development. The gene discussed is KLRK1; the disease is Behcet disease.