IL33 and neoplasm: FCGR3 was also expressed on the surface of cDC1s of in vitro-generated FL-33-DCs and in vivo splenic cDC1s of IL-33-injected mice, regardless of tumor-bearing condition (Fig. 4E), but was undetectable in any DC subsets of FL-DCs or FL-GM-DCs (Fig. S7B).