Nature Communications 6, Article number: 7354 (2015); Published: 24 June 2015; Updated: 3 August 2015.

In this Article, there are errors in the labelling of the y axes in Figs 2 and 3. In both figures, ‘Fluorescence intensity’ should read ‘Number of pixels’. The correct versions of these figures appear below.

Figure 2

Figure 3