Published on in Vol 21, No 4 (2019): April
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/13050, first published
.
1 Psychology-Addictions Treatment Research Center, University of Pennsylvania, Philadelphia, PA, United States
2 Substance Use Disorders Institute, University of the Sciences, Pennsylvania, PA, United States
3 Department of Psychology and Neuroscience, Baylor University, Waco, TX, United States
*all authors contributed equally