Approved by: Jorge Busciglio, University of California, Irvine, United States
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The journal retracts the 27th June 2016 article cited above.
Following publication, concerns were raised regarding the integrity of the images in the published figures. An investigation was conducted in accordance with Frontiers' policies, and image duplication concerns were identified in Figure 6C. The authors failed to provide a satisfactory explanation during the investigation, the data and conclusions of the article have been deemed unreliable and the article has been retracted.
The authors agreed to this retraction. Frontiers would like to thank the users on PubPeer for bringing the published article to our attention.