BMDCs were generated as previously described (25 (link), 30 (link), 31 (link), 33 (link), 34 (link)). Briefly, femurs and tibiae were collected from freshly euthanized B6 mice, BM harvested, and single cell seeded at 2 × 105/ml. RPMI 1640 (Lonza) was supplemented with 10% FBS and 1% penicillin/streptomycin, plus 20 ng/ml mouse GM-CSF (all from BioLegend). For generation of CD103+ BMDCs, Flt-3 (100 ng/ml, eBioscience) was used instead of GM-CSF. On day 4, fresh GM-CSF (20 ng/ml) was added to both culture conditions.