Nat. Neurosci. 19, 283–289 (2016); published online 4 January 2016; corrected after print 28 April 2016

In the version of this article initially published, the word “University” was missing from the affiliation of authors Hongbin Yang, Junhua Yang, Wang Xi, Sijia Hao, Liya Zhu, Huifang Lou, Yanqin Yu, Shumin Duan and Hao Wang. The correct affiliation should be “Department of Neurobiology, Key Laboratory of Medical Neurobiology (Ministry of Health of China), Key Laboratory of Neurobiology of Zhejiang Province, Zhejiang University School of Medicine, Hangzhou, China.” The error has been corrected in the HTML and PDF versions of the article.