Vol. 214, No. 7, July 2017. https://doi.org/10.1084/jem.20161070
The authors regret that an error appeared in their original version of Fig. 4. Some of the PE and PS species listed on the x axis of Fig. 4 B were incorrect. The corrected figure and corresponding legend appear below.
The online HTML and PDF versions of this paper have been corrected. The error remains only in the print version.