Nat. Neurosci. 14, 295–296 (2011); published online 23 January 2011; corrected after print 15 August 2011

In the version of this article initially published, the numbers of rats reported in the legend of Figure 3a were transposed with those in the legend of Figure 3b. The correct values are (a) ZIP, n = 6; SCR ZIP, n=8; and (b) ZIP and SCR ZIP, n = 7 each. In all cases, the correct numbers were used for the analyses, so the statistics reported remain accurate. The error has been corrected in the HTML and PDF versions of the article.