To validate whether the CXCR3-CXCL 9, 10, 11 axis is over-expressed similarly in case of retinitis (HR) and gastro-enteric (HG) patients belonging to group 1, we compared the relative mRNA expression of some of the components of the CXCL9, 10, 11-CXCR3 axis along with some downstream effectors. This evidence concerns the gene CXCL9 and retinitis.