A stronger link of TSLP and disease can be found in patients with atopic dermatitis with an increase of TSLP level [59] and increased frequency of human CD4+Th2 memory cells expressing the prostaglandin D2 receptor (CRTH2) [59], [60], suggesting TSLP may be involved in maintenance of Th2 memory pools. The gene discussed is PTGDR2; the disease is atopic eczema.