CXCL9 and vitiligo: Recent studies report a Th1/IFN-γ immune response in both human and a mouse model of vitiligo that involves elevated CXCL9, 10, and 11 productions, among which CXCL10 participated in the targeted migration of T cells (18), triggering an immune cell infiltration at the early stage (72), and involved in the downregulation of keratinocyte glycoprotein non-metastatic melanoma protein B (GPNMB) (75).