Flow cytometric analysis of cells in PB, BM, spleen, liver, and thymus from normal littermates (upper) and Tg-mice (lower) treated with 500 ng of hGM-CSF. Cells were stained with FITC anti–Mac-1 and PE-anti-NK1.1. Mac-1⁺NK1.1⁺ cells in PB, BM, spleen, and liver, but not in thymus, increased in Tg-mice.