Funding for this research was provided by:
National Institute on Drug Abuse (5R21DA041018)
NIH Office of the Director (5R24OD018546)
National Institute on Aging (R01 AG043540)
Received: 13 December 2018
Accepted: 12 February 2019
First Online: 5 March 2019
Ethics approval and consent to participate
: Animal procedures strictly followed the Institutional Animal Care and Use Committee guidelines approved protocols at University of Nebraska Medical Center (UNMC) (IACUC 18–109) and Institutional Guidelines (11004) approved by the Animal Experimentation Committee of Central Institute of Experimental Animals (CIEA).
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