Funding for this research was provided by:
National Institutes of Health (R01 NS063878)
National Natural Science Foundation of China (81660213)
Article History
Received: 7 September 2016
Accepted: 28 November 2016
First Online: 22 December 2016
Compliance with Ethical Standards
: All applicable international, national, and/or institutional guidelines for the care and use of animals were followed. All procedures performed in studies involving animals were in accordance with the ethical standards of University of Nebraska Medical Center, Omaha, NE, USA.
: The authors declare that they have no competing interests.