Published on in Vol 20, No 8 (2018): August
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/9873, first published
.
1 Centre for Alcohol and Drug Research, Stavanger University Hospital, Stavanger, Norway
2 Department of Psychiatry, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
3 Philadelphia VA Medical Center, Philadelphia, PA, United States