Funding for this research was provided by:
National Institute on Drug Abuse (DA042502, DA039895)
Received: 31 October 2018
Accepted: 4 February 2019
First Online: 8 February 2019
Ethics approval and consent to participate
: All animal experiments were approved by the Michigan State University Institutional Animal Use and Care (IACUC) committee and adhered to the guidelines set in the Guide for the Care and Use of Laboratory Animals of the National Institutes of Health.
: Not applicable.
: The authors declare that they have no competing interests.
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