CXCL10 and tuberculosis: However, we replaced IP-10 with MIG for further analysis despite a lower variable importance score because of the ≥2-fold difference in the medial level of MIG between patients with and without TB, prior data demonstrating that MIG and IP-10 levels were highly correlated, and prior data suggesting that IP-10 is more likely to degrade after long-term storage [21, 41].