Affiliation: | 1. British Columbia Centre on Substance Use, Vancouver, Canada Department of Medicine, Faculty of Medicine, University of British Columbia, Vancouver, Canada;2. British Columbia Centre on Substance Use, Vancouver, Canada;3. Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, Canada;4. British Columbia Centre on Substance Use, Vancouver, Canada Faculty of Health Sciences, Simon Fraser University, Burnaby, Canada |