Scientific Reports 6: Article number: 23271; published online: 16 March 2016; updated: 29 April 2016.

In the HTML version of this Article, Gottfried Schlaug is incorrectly listed as being affiliated with ‘Department of Physical Therapy and Rehabilitation Sciences Institute University of Toronto Toronto, Ontario, Canada’. The correct affiliation is listed below:

Department of Neurology; Neuroimaging and Stroke Recovery Laboratory Beth Israel Deaconess Medical Center and Harvard Medical School Boston, MA, USA.