1. Esben Houborg is with the Center for Drug and Alcohol Research, Aarhus University, Copenhagen, Denmark. Marie Jauffret-Roustide is with the Centre d’Étude des Mouvements Sociaux (Inserm U1276/CNRS UMR 8044/EHESS), Paris, France; the Baldy Center for Law and Social Policy, Buffalo University, Buffalo, NY; and the British Columbia Center on Substance Use, Vancouver, BC, Canada. Marie Jauffret-Roustide is also a Guest Editor of this supplement issue.