Finally, there were no significant differences in the frequency of the genotypes, carriers, and haplotypes for any of the HTR2A, HTR2C, and MAOB gene polymorphisms studied between asthma patients with T2-high and T2-low phenotypes, non-allergic and allergic asthma, non-eosinophilic and eosinophilic asthma, or with and without AERD (data available on request). The gene discussed is MAOB; the disease is asthma.