Kang et al. (2013) discovered that the migration of eosinophils in allergic asthma seems to hinge on 5-HT2A receptor activation [43], while Dürk et al. (2013) showed that 5-HT2 receptors are implicated in platelet function relevant to allergic asthma [14]. The gene discussed is HTR2A; the disease is allergic asthma.