Correction to: Nature Communications https://doi.org/10.1038/ncomms9494, published online 25 September 2015.

This Article contains an error in Figure 2. In Fig. 2c the AMD3100 image was inadvertently duplicated from the anti-CXCR4-Ab image. The incorrect images are shown below.

The correct images are shown below.

This error has not been corrected in the PDF or HTML versions of the Article.