CD1D and leukemia: We observed that recipient mice transplanted with CD1d−/− TCL1 tumors died earlier from leukemia than mice transplanted with TCL1 tumors (CD1d−/− TCL1 n = 4; TCL1 n = 8; Log-rank Mantel Cox test p = 0.0009; Hazard Ratio 61.87; 95% Confidence Interval = 5.405 to 708.2; Figure 6B).