1. Bowling Green State University, Bowling Green, Ohio, USA
2. University of California Los Angeles, Los Angeles, California, USA
3. Université du Québec à Trois-Rivières, Trois-Rivières, Quebec, Canada
4. Université de Montréal, Montreal, Quebec, Canada
5. Institute of Psychology, ELTE Eötvös Loránd University, Budapest, Hungary
6. Centre of Excellence in Responsible Gaming, University of Gibraltar, Gibraltar, Gibraltar
7. University of Minnesota, Minneapolis, Minnesota, USA
8. University of Washington, Seattle, Washington, USA
9. University of Duisburg-Essen, Duisburg, Germany
10. School of Psychology, University of Southampton, UK
11. Cardinal Stefan Wyszynski University in Warsaw, Poland
12. University of California San Diego, San Diego, California, USA
13. Institute of Psychology, Polish Academy of Sciences, Poland
14. Nottingham Trent University, Nottingham, United Kingdom
15. Independent Practice
16. International Institute for Trauma and Addiction Professionals, Carefree, Arizona, USA
17. Department of Psychiatry, Centre of Postgraduate Medical Education, Warsaw, Poland
18. Institute of Mental Health Research, Royal Ottawa Health Care Group, Ottawa, ON, Canada
19. Department of Psychiatry, McMaster University, Hamilton, ON, Canada
20. University of Nevada Las Vegas, Las Vegas, Nevada, USA