Correction to: Nature Medicine https://doi.org/10.1038/nm1676, published online 18 November 2007.

In the originally published version of this article, the day 8, 19z1+CD80+4-1BBL+, group of mice was inadvertently duplicated from a separate group of mice in Fig. 3a. The original data were located, and this error has now been corrected and can be seen as Fig. 1 below. The empty spaces in Fig. 3a indicate deceased mice.

Fig. 1
figure 1

Revised Fig. 3a