1. Department of Medicine, University of British Columbia, Vancouver, Canada, and St. Paul’s Hospital, Vancouver, Canada
2. Department of Medicine, University of British Columbia, Vancouver, Canada, and British Columbia Centre on Substance Use, St. Paul’s Hospital, Vancouver, Canada
3. British Columbia Centre on Substance Use, Vancouver, Canada, and Graduate Programs in Rehabilitation Sciences, Faculty of Medicine, University of British Columbia, Vancouver, Canada
4. Pharmacy Department, Providence Health Care, St. Paul’s Hospital, Vancouver, Canada, and Faculty of Pharmaceutical Sciences, University of British Columbia, Vancouver, Canada
5. British Columbia Centre on Substance Use, Vancouver, Canada, and Department of Medicine, Faculty of Medicine, University of British Columbia, Vancouver, Canada