Flow cytometry was performed as previously described (10 (link)). All of the conjugated antibodies were purchased from eBioscience and detailed information is given in Supplementary Table S2. Fc Blocking Ab (catalog # 14–9161–73), anti-mouse CD16/CD32 (catalog # 14–0161–82), fixation/permeabilization concentrate (catalog # 00–5123–56), fixation/permeabilization diluent (catalog # 00–5223–56), and permeabilization buffer (catalog # 00–8333–56) were also purchased from eBioscience. Cytometry data were acquired on a BD LSRFortessa 6-Laser flow cytometer and analyzed on FlowJo 6 software. This work was supported by the Northwestern University – Flow Cytometry Core Facility supported by NCI CA060553.