Scientific Reports 5: Article number: 16188; published online: 06 November 2015; updated: 22 December 2017.

In this Article, ‘Centre for Neuroregeneration, University of Edinburgh, Chancellor’s Building, 49 Little France Crescent, Edinburgh, EH16 4SB’ is incorrectly listed as a present address for Hong-Yan Zhang and should be listed as a second affiliation.