Nature Communications 7: Article number: 13040; DOI: 10.1038/ncomms13040 (2016); Published: October 10 2016; Updated: August 30 2017
This Article contains typographical errors in Fig. 3 and Equation 23.
In Fig. 3c, the labels ‘12C’ and ‘13C’ in the key should be reversed. The correct version of Fig. 3 appears below as Fig. 1.
The correct form of Equation 23 is as follows: