CXCL9 is a T-cell chemoattractant and closely related to CXCL10 and CXCL11—both of which showed concentration decreases in MMD patients but did not meet the statistical filtering for MMD-affected proteins (>1.5 fold concentration changes, p-value < 0.05). The gene discussed is CXCL9; the disease is multiminicore myopathy.