Nature Communications 4: Article number: 2563 (2013); Published: 11 October 2013; Updated: 19 December 2013.

In this Article, there are errors in the labelling of the x axes in Fig. 3. In panel e, the label ‘BLM day-21’ should have been ‘BLM day-7’. In panel g, the label ‘BLM day-7’ should have been ‘BLM day-21’. The correct version of this figure follows.

Figure 3