Funding for this research was provided by:
National Institute on Drug Abuse (R33DA035615, 1T32DA041898, R01DA038193)
Text and Data Mining valid from 2019-06-25
Received: 15 February 2019
Accepted: 30 May 2019
First Online: 25 June 2019
Ethics approval and consent to participate
: This research was approved by Center on Addiction institutional review board, protocol #213.
: Not applicable.
: The authors declare that they have no competing interests.