
Keywords: iNOS، سنتاز اکسید نیتریک قابل القا; Adult asthma; Asthma; Fractional exhaled nitric oxide; Genetic polymorphism; Single nucleotide polymorphismFeNO, fractional exhaled nitric oxide; iNOS, inducible nitric oxide synthase; NOS2A, inducible nitric oxide synthase; SNPs, single nucleotide polymo