Genes nearest ASMC QTLs that were also associated with asthma in the childhood-onset asthma GWAS were enriched for “SMAD protein phosphorylation” (adj P = 2.8 × 10−4) and “positive regulation of NK T cell differentiation” (adj P = 1.7 × 10−4), pathways with direct roles in smooth muscle contraction and AHR. Here, AHR is linked to asthma.