Flow cytometric analyses were performed as previously described [57 (link)]. eBioscience antibodies were used unless otherwise specified: TCRβ (H57–597), CD4 (RM4–5), CD8 (53–6.7), CD19 (eBio1D3), CD45 (30-F11), CD11b (M1/70), CD44 (IM7), CD62L (MEL14), CD11c (N418), Ly6G (1A8), PDGFRα (APA5), O4 (O4; Miltenyi), CD13 (R3–242; BD), CD31 (390; BioLegend), MHC1 (28–8-6; BioLegend), and CD16/CD32 (93). Viability was assessed using a Zombie Aqua Fixable Viability kit (cat. no. 423101, BioLegend) or Ghost Dye Violet 510 (cat. no. 13–0870, Tonbo Biosciences).