Nat. Neurosci. 19, 1743–1749 (2016); published online 31 October 2016; corrected after print 29 November 2016; addendum published after print 29 May 2017

The authors wish to acknowledge a potentially relevant work that they were made aware of after publication: Lee, A.T., Vogt, D., Rubenstein, J.L. & Sohal, V.S. A class of GABAergic neurons in the prefrontal cortex sends long-range projections to the nucleus accumbens and elicits acute avoidance behavior. J. Neurosci. 34, 11519–11525, http://dx.doi.org/10.1523/JNEUROSCI.1157-14.2014 (2014). This work describes an approach for using Dlx1/2 enhancers to attempt to achieve selective expression in cortical GABAergic interneurons. Although thorough validation was not performed, the results are consistent with the possibility that other regulatory elements may be generalizable as an effective way of targeting specific cell types.