CSF3 and inclusion body myositis: In particular, eotaxin (CCL11), involved in a chemotactic activity for eosinophils,21 showed a statistically significant increase of 4.2 times in IBM versus CTL fibroblasts (P‐value < 0.05, n = 13 IBM vs. 12 CTL), whereas GCSF (that regulate the production, differentiation, and function of granulocytes) showed a high 13.3‐fold change ratio between groups (Figure2B).