1. Psychiatry Service, VA Connecticut Healthcare System, West Haven, CT, USA
2. Abraham Ribicoff Research Facilities, Connecticut Mental Health Center, New Haven, CT, USA
3. Department of Psychiatry, Yale University School of Medicine, New Haven, CT, USA
4. Social, Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, King's College London, London, UK
5. South London and Maudsley NHS Mental Health Foundation Trust, London, UK
6. Addictions Division and Centre for Complex Interventions, Centre for Addiction and Mental Health (CAMH), Toronto, Canada
7. Department of Psychiatry, Temerty Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
8. The National Centre for Youth Substance Use Research, University of Queensland, Brisbane, Australia
9. Copenhagen Research Center for Mental Health – CORE, Mental Health Center Copenhagen, Copenhagen University, Copenhagen, Denmark
10. Department of Public Health, Section of Epidemiology, University of Copenhagen, Copenhagen, Denmark
11. Department of Psychosis Studies, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
12. Institute for Clinical Sciences, Imperial College London, London, UK
13. Beth Israel Deaconess Medical Center, Massachusetts Mental Health Center, Harvard Medical School, Boston, MA, USA
14. Olin Neuropsychiatry Ctr. Institute of Living, Hartford, CT, USA
15. School of Psychology and Illawarra Health and Medical Research Institute, University of Wollongong, Wollongong, NSW, Australia
16. Australian Centre for Cannabinoid Clinical and Research Excellence (ACRE), New Lambton Heights, NSW, Australia