Funding for this research was provided by:
Foundation for the National Institutes of Health (R01 DA037568, R01 DA13336)
Text and Data Mining valid from 2020-01-09
Received: 22 July 2019
Accepted: 21 October 2019
First Online: 9 January 2020
Ethics approval and consent to participate
: Not applicable
: Each author has contributed to the conception and design of the work, the acquisition of data or the analysis of the data in a manner substantial enough to take public responsibility for it. In addition, each author believes that the paper represents valid work and has reviewed the final version of the manuscript and approves consent for publication.
: The authors declare that they have no competing interests.