The concentrations of Th2-related chemokines, including macrophage-derived chemokine (MDC) and thymus and activation regulated chemokine (TARC), associated with the infiltration of inflammatory cells into skin lesions, also show a strong correlation with the severity of AD (Nakazato et al., 2008; Kim et al., 2013). The gene discussed is CCL17; the disease is Alzheimer disease.