Funding for this research was provided by:
National Institute on Drug Abuse (R01DA043501)
U.S. National Library of Medicine (R01LM012848)
Article History
Received: 19 July 2018
Accepted: 20 March 2019
First Online: 10 April 2019
Ethics approval and consent to participate
: Not applicable.
: Not applicable.
: Author Qing Lu is currently acting as an Editorial Board Member for BMC Genetics. All other authors declare that they have no competing interests.
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