NTRK2 and allergic asthma: Moreover, we observed no significant differences in the frequencies of NTRK2 rs1439050 genotypes (p = 0.09), alleles (p = 0.06), GG vs. T allele carriers (p = 0.13), and TT vs. G carriers (p = 0.09) between non-allergic and allergic asthma patients.