Scientific Reports 6: Article number: 30769; published online: 28 July 2016; updated: 15 March 2017

The original HTML version of this Article listed an incorrect Affiliation for all authors. The correct Affiliation is listed below:

Institute for Neuroscience, Department of Pharmacology and Physiology, The George Washington University, Washington DC 20037, United States.

This has now been corrected in the HTML version of this Article; the PDF version was correct at the time of publication.