Substance Abuse and Mental Health Services Administration (2)

U.S. Department of Health & Human Services, Rockville, MD, USA

The Association for Addiction Professionals (2)

The Association for Addiction Professionals, Alexandria, VA, USA

The Canadian Centre on Substance Use and Addiction (2)

The Canadian Centre on Substance Abuse, Ottawa, ON, Canada

The National Institute on Drug Abuse (2)

The National Institute on Drug Abuse, Bethesda, MD, USA

The Society for the Study of Addiction (2)

The Society for the Study of Addiction, Northampton, UK