Cells were released from culture plates using TrypLE and were stained after Fc-block (Invitrogen) with a panel of directly fluorochrome-conjugated mAbs against the following murine molecules (clone; source): Axl (R&D; Minneapolis, MN); CD4 (L3T4; eBioscience; San Diego, CA); CD8 (CD8b.2; Biolegend; San Diego, CA); CD11b (M1/70; eBioscience); CD11c (N418; eBioscience); CD19 (MCA1439F; AB Serotec); CD44 (IM7; eBioscience); CD45 (30-F11; BD); CD80 (16-10A1; BioLegend); CD206 (C068C2; BioLegend); Ly6C (AL-21; BD); Ly6G (1A8; BD, Franklin Lakes, NJ); Mertk (R&D). Experiments were performed on an LSR II flow cytometer and data were analyzed as previously described (25 (link)).