Nature Immunology 6, 17–2 (2005)
On page 18, Figure 1 was incorrect. The correct figure is presented here. Nature Immunology regrets this error.
On page 19, in the legend to Figure 3, line 7 should read “(such as CD19, NKG2D or integrins)....”
The online version of the original article can be found at 10.1038/ni1153