ITGAM and neoplasm: We did not observe a well-defined CD11b+Ly6G−Ly6Chigh population that characterized monocytic MDSCs in other tumor-bearing models [2]; therefore the monocytic MDSC population was defined based on CD11b+Ly6G−Ly6C+ expression (Figure 2A), realizing that this may contain a mixed population of monocytic cells.