Age and gender of BD did not affect the result of the study: chi-squared test for trend among individuals with <40; <50, and ≥50 years old was p = 0.74, 0.22, and 0.62 for PD-1, IFNL3, and TLR2, respectively; chi-square test for gender (female vs. male) was p = 0.67, 0.83, and 0.92 and for PD-1, IFNL3, and TLR2, respectively. The gene discussed is PDCD1; the disease is Behcet disease.