Funding for this research was provided by:
NIDA (R01 DA045800, P50 DA046351)
Article History
Received: 30 April 2019
Revised: 22 October 2019
Accepted: 13 November 2019
First Online: 2 December 2019
Compliance with Ethical Standards
:
: The authors declare that they do not have a conflict of interest.
: The content is solely the responsibility of the authors and does not necessarily represent the official views of NIDA, the NIH, or the US Government.
Free to read: This content has been made available to all.