CD4 and dry eye syndrome: In the human KCs, we also found that the NTCI suppressed the genes encoding GM‐CSF (CSF2) and IL‐8 (CXCL8), which mediate skin infiltration by eosinophils, monocytes/macrophages, and other myelomonocytic cells, in addition to the previously observed suppression of the CD4+ T cells in the skin infiltrate.9