Nature 516, 192–197 (2014); doi:10.1038/nature14047

In this Article, the address listed as Nicole Cloonan’s present address (QIMR Berghofer Medical Research Institute, Queensland 4006, Australia) should have been listed as her other affiliation with superscript 16, because the work she did was split equally between the two institutions. This has been corrected in the online versions of the paper.