CCL5 and Behcet disease: Compared with BD patients, the frequency of the CCL5/rs2107538 CC genotype (P = 0.048, OR = 1.309, and 95% CI = 1.002–1.710) was decreased and the CCL5/rs2107538 CT genotype frequency (P = 0.042, OR = 0.76, and 95% CI = 0.583–0.991) was increased in the controls.