Interestingly, the usage of selective β-2-adrenoreceptor agonist (ATC: R03AC, 13 users), which is commonly found in asthma inhalators, decreased the level of circulating vascular endothelial growth factor D (VEGF-D), which is implicated in the metastasis of non-small lung cancer16, 17. This evidence concerns the gene VEGFD and asthma.