Nature Medicine 12, 624–626 (2006)

We are retracting this report as it contains several errors, including duplications and manipulations of some flow cytometry plots in Figure 1a and in Supplementary Figure 2 online, incorrect juxtaposition of data in Figure 1g (spleen) that in fact derive from different experiments, and inaccurate reporting of the absolute number of iNKT cells and s.d. values, even though the statistical significance remains unchanged. Although original data exist for each figure that largely support the conclusions drawn, we believe that the number of figures affected means that the appropriate response is to retract this paper.