IL4 and asthma: Theanalysis of 40 individuals with mild asthma and 49 patients with the severe formof the disease revealed a negative association of genotype GG IL4 (OR = 0.39, 95%CI = 0.15−0.99, p = 0.035), and also a trend towards a positive association of theGC IL4 genotype (OR = 2.52, 95% CI = 0.98−6.57, p = 0.052) with mild BA.