1. From the Institute for Mental Health Policy Research Centre for Addiction and Mental Health (CAMH) Toronto Ontario Canada
2. Campbell Family Mental Health Research Institute CAMH Toronto Ontario Canada
3. Dalla Lana School of Public Health University of Toronto Toronto Ontario Canada
4. Department of Psychiatry University of Toronto Toronto Ontario Canada
5. Institute of Medical Science University of Toronto Toronto Ontario Canada
6. Center for Social and Affective Neuroscience Department of Clinical and Experimental Medicine Linköping University Linköping Sweden
7. Addictions Unit Psychiatry Department Neurosciences Institute, Hospital Clínic Barcelona Spain
8. IDIBAPS (Institut per a la Recerca Biomèdica Agustí Pi i Sunyer) Barcelona Spain
9. Red de Trastornos Adictivos Instituto Carlos III Madrid Spain