Dixit et al. showed that among 24 CFTR mutations, the heterozygous allele was found only in R553X mutation in 1.6% (n = 4) among asthma cases and 0.4% (n = 2) among controls, while no significant difference in the genotype and allele frequency of R553X mutation (OR = 1.339, 95% CI: 0.755–2.374, p = 0.685) was reported [17]. The gene discussed is CFTR; the disease is asthma.