Vol. 216, No. 4, April 1, 2019. 10.1084/jem.20181773.

The authors regret that in the original version of this paper, the peptide sequence in Fig. 6 B appeared incorrectly as “LVMVKVVP.” Panel B appears below with the corrected peptide sequence, “LVMVKVVPTCLK.” All versions of this article have been corrected.

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