Correction to: Nature Medicine https://doi.org/10.1038/nm.3867, published online 25 May 2015

Based on a comprehensive review of all data items, additional instances of image reuse or discrepancy between figures and associated data were identified. Duplicate images were found in Supplementary Fig. 8d and Supplementary Fig. 7h (Supplementary Fig. 8d has been corrected), Supplementary Fig. 3c and Fig. 4h (Supplementary Fig. 3c has been corrected), Supplementary Fig. 6a and b (Supplementary Fig. 6a has been corrected), Fig. 1b and Supplementary Fig. 1a (Supplementary Fig. 1a has been corrected), and two images in Supplementary Fig. 1f (Supplementary Fig. 1f has been corrected). Additionally, the lower panel of Fig. 2f was based on an incorrect dataset (source data for Fig. 2f in Supplementary information has been corrected) and the standard deviation bar for BMEC-60 in Fig. 1e was incorrect (Fig. 1e has been corrected). The original and corrected figures can be found in the accompanying Supplementary information. These errors were introduced during figure preparation and do not impact the conclusions of the article.