CXCL10 and tuberculosis: T-Track® TB (Mikrogen GmbH, Neuried, Germany) is a novel Conformité Européene (CE)-marked in vitro diagnostic RT-qPCR infection detection test based on the combined assessment of the relative mRNA level of both IFNG and CXCL10 in specifically restimulated vs. non-stimulated whole-blood samples, as indirect biomarkers of Mtb infection.