MIF and Miyoshi myopathy: MM, multiple myeloma; MΦs, macrophages; PBMCs, peripheral blood mononuclear cells; MDSCs, myeloid-derived suppressor cells; BMSCs, bone marrow stromal cells; MSCs, mesenchymal stromal cells; HSPCs, hematopoietic stem and progenitor cells; MMPs, matrix metalloproteinases; HSPGs, heparan sulfate proteoglycans; MIF, macrophage migratory inhibitory factor; TME, tumor microenvironment.