Correction to: Nature Medicine https://doi.org/10.1038/nm.3618, published online 6 July 2014

In the original version of the article, due to a figure preparation error in pseudo-coloring and image selection, the image shown in Fig. 3e was incorrect. An updated Fig. 3e is shown below (Fig. 1).

Fig. 1
figure 1

Corrected Fig. 3e.