Nature Communications 3: Article number: 676 (2012); Published: 14 February 2012; Updated: 16 October 2013.

When preparing Fig. 6 for this Article, the labels ‘Padi4+/+’ and ‘Padi4−/−’ at the foot of the histograms in panels b, c and d were accidentally placed under the wrong bars. The correct version of Fig. 6 appears below.

Credit: Figure 6