Scientific Reports 5: Article number: 9962; published online: 30 June 2015; updated: 24 August 2015

This Article contains a typographical error in Affiliation 2. The correct affiliation is listed below:

Coma Research Group, Centre for Hyperbaric Oxygen and Neurorehabilitation, Guangzhou General Hospital of Guangzhou Military Command, Guangzhou 510010, China.