We demonstrated that asthma patients carrying homozygote G/G had significantly higher levels of serum CXCL10 than those carrying homozygote A/A (41.4 ± 7.8 pg/ml vs 38.1 ± 3.3 pg/ml, p = 0.03) (Fig. 6). Here, CXCL10 is linked to asthma.