1. 1General Psychology: Cognition and Center for Behavioral Addiction Research (CeBAR), University of Duisburg-Essen, Duisburg, Germany
2. 2Erwin L. Hahn Institute for Magnetic Resonance Imaging, Essen, Germany
3. 3Department of Psychiatry and Psychotherapy, Research Group S:TEP (Substance Use and Related Disorders: Treatment, Epidemiology, and Prevention), University of Lübeck, Lübeck, Germany
4. 4Institute of Psychology, ELTE Eötvös Loránd University, Budapest, Hungary
5. 5Department of Psychosomatic Medicine and Psychotherapy, Hannover Medical School, Hannover, Germany
6. 6Department of Psychotherapy and Systems Neuroscience, Justus Liebig University of Giessen, Giessen, Germany
7. 7Bender Institute of Neuroimaging, Justus Liebig University of Giessen, Giessen, Germany
8. 8College of Education, Psychology, and Social Work, Flinders University, Adelaide, Australia
9. 9Amsterdam University Medical Center, Department of Psychiatry, University of Amsterdam, Amsterdam, The Netherlands
10. 10Arkin Mental Health Care, Amsterdam, The Netherlands
11. 11Amsterdam Public Health Research Institute, Amsterdam, The Netherlands
12. 12Department of Addictive Behavior and Addiction Medicine, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
13. 13Hertfordshire Partnership University NHS Foundation Trust, Hertfordshire, UK
14. 14Centre for Health Services and Clinical Research, School of Life and Medical Sciences, University of Hertfordshire, Hatfield, UK
15. 15School of Clinical Medicine, University of Cambridge, Cambridge, UK
16. 16Department of Psychiatry, University of Cambridge, Cambridge, UK
17. 17Cambridge & Peterborough NHS Foundation Trust, Cambridge, UK
18. 18University of Nevada, Las Vegas, Department of Psychology, Las Vegas, NV, USA
19. 19Institute of Psychology, University of Lausanne (UNIL), Lausanne, Switzerland
20. 20Centre for Excessive Gambling, Lausanne University Hospitals (CHUV), Lausanne, Switzerland
21. 21Departments of Psychiatry, Neuroscience and Child Study, Yale University School of Medicine, New Haven, CT, USA
22. 22Connecticut Council on Problem Gambling, Wethersfield, CT, USA
23. 23Connecticut Mental Health Center, New Haven, CT, USA