Nature Communications 7: Article number: 13176 (2017); Published 19 October 2016; Updated 22 February 2017

In this article, there are errors in the labelling of the y axis in Fig. 1b. The labels '50', '100' 'and ‘150’ should have been ‘500’, '1,000' and ‘1,500’, respectively. The correct version of this figure appears as Fig. 1 below.

Figure 1
figure 1