Funding for this research was provided by:
National Institute on Drug Abuse (P50 DA010075)
National Institute on Drug Abuse (P50 DA039838)
National Institute on Drug Abuse (T32 DA017629)
National Institutes of Health (K01 ES025437)
National Science Foundation (DGE-1144860)
Article History
Received: 23 December 2015
Revised: 31 July 2016
Accepted: 19 August 2016
First Online: 25 August 2016
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.