Comparison of engraftment of chronic phase CML cells in NOD/SCID versus SCID mice. Each (○) represents the mean level of human cell engraftment obtained after transplantation of PB or BM cells from individual patients with chronic phase CML into groups of NOD/SCID or SCID mice, as indicated on the horizontal axis. Engraftment in NOD/SCID mice was significantly higher than in SCID mice (P = .015). The raw data for the SCID mice can be found in the report of Sirard et al.18