Flow cytometry was performed as described (10 (link), 15 (link)). Cells were incubated with anti-mouse CD16/32 (Fc Block; BD Biosciences) before staining with primary antibody or isotype control antibodies (10 min, 22°C). Ten-thousand to 50,000 events per sample were acquired using a CYAN ADP flow cytometer (Beckman-Coulter) and analyzed with FCS Express 3 (De Novo Software). The following antibodies were used: anti-ScaI-phycoerythrin (PE), anti-TNFα-allophycocyanin, anti-Ly6G-PE, anti-B220-allophycocyanin-CY7, anti-CD11c-allophycocyanin, anti-B220-FITC, anti-Ly6C-FITC, anti-CCR7-PE (BD Bioscience), avidin-PE-CY7, anti-CD11b-Brilliant Violet, anti-CCR9-FITC, and anti-PDCA-1-biotin (BioLegend). Intracellular TNFα staining was performed as described (16 (link)).