SDF4 and acute myeloid leukemia: Significantly lower in AML-MSC versus R-MSCs 13 proteins (P4HB, SOD1, HEL-S-44, SDF4, PDIA3, HEL-S-269, PAWR, SGSH, LMNA, S100A13, CTSD, HEL-S-130P, TNFRSF11B, AXL, PTGDS, and RCN1).