GFAP and myeloid sarcoma: Moreover, the levels of miR-320b did not correlate with any cytokine level, and none of the MS-associated miRNA show correlation with sNfL, GFAP or CHI3L1, suggesting that miRNA levels may be independent of other biomarker levels such as sNfL, GFAP or chi3l1 and therefore might represent other biological processes underlying MS.