1. Arkin Mental Health and Addiction Treatment Center; Amsterdam the Netherlands
2. Amsterdam Institute for Addiction Research; Department of Psychiatry; Academic Medical Center; University of Amsterdam; Amsterdam the Netherlands
3. Department of Psychiatry; University Medical Center Groningen; University of Groningen; Groningen the Netherlands
4. Trimbos-Instituut and ICASA Foundation; Utrecht the Netherlands
5. National Drug Research Institute/Curtin University of Technology; Perth Western Australia Australia
6. Laboratoire de psychiatrie Département d'addictologie; Université de Bordeaux; Bordeaux France
7. Institute of Medical Chemistry, Molecular Biology and Pathobiochemistry; Semmelweis University; Budapest Hungary
8. Bergen Clinics Foundation; Bergen Norway
9. University Hospital of Psychiatry; Bern Switzerland
10. Reinier van Arkel groep; 's-Hertogenbosch the Netherlands
11. Servei de Psiquiatria; Hospital Universitari Vall d'Hebron; CIBERSAM; Department of Psychiatry; Universitat Autònoma de Barcelona; Barcelona Spain
12. Institute of Psychology; Eötvös Loránd University; Budapest Hungary
13. Collaborative Antwerp Psychiatry Research Institute (CAPRI, UA); PC Alexian Brothers; Boechout Belgium
14. Department of Psychiatry; SUNY Upstate Medical University; Syracuse NY USA
15. Department of Neuroscience and Physiology; SUNY Upstate Medical University; Syracuse NY USA
16. Department of Clinical Neuroscience; Division of Psychiatry; Karolinska Institutet; Stockholm Sweden
17. Nyírő Gyula Hospital Drug Outpatient and Prevention Center; Budapest Hungary
18. National Drug and Alcohol Research Centre; University of New South Wales; Sydney New South Wales Australia
19. Columbia University/the New York State Psychiatric Institute; New York NY USA
20. Department of Psychology; University of Fribourg; Fribourg Switzerland
21. Department for Substance Abuse Treatment; Ostfold Hospital Trust; Fredrikstad Norway