We previously found that circulating MIG causally affects the IP10 level.16 MIG (CXCL9), IP10 (CXCL10), and IP9 (CXCL11) share the same receptor, C-X-C chemokine receptor 3 (CXCR3),38 but colocalization in our study did not support common causal SNPs for IP10 and Crohn disease. The gene discussed is CXCL9; the disease is Crohn disease.