Scientific Reports 6: Article number: 28025; published online: 20 June 2016; updated: 28 November 2016

In the original Supplementary Information file published with this Article, the y-axis label for Supplementary Figure 2 was omitted. This has now been updated to read ‘Mean Fluorescence Intensity’.

This error has been corrected in the Supplementary Information that now accompanies the Article.