Funding for this research was provided by:
National Institute of Neurological Disorders and Stroke (NS054050)
Article History
Accepted: 28 November 2015
First Online: 11 December 2015
Compliance with ethical standards
:
: On behalf of all authors, the corresponding author states that there is no conflict of interest.
: The authors confirm that all procedures, including the informed consent, were conducted in accordance with the ethical standards of the Institutional Review Board of the University of Illinois at Urbana-Champaign and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.