Moreover, key mediators such as interferon-γ (IFN-γ), C-X-C chemokine ligand 9 (CXCL9) and 10 (CXCL10), as well as interleukin-15 (IL-15) are also implicated in etiology of vitiligo [4,56,59]. This evidence concerns the gene CXCL9 and vitiligo.