1. Department of Psychiatry and Psychotherapy, University of Luebeck, Luebeck, Germany
2. Department of Pediatric and Adolescent Medicine, University of Luebeck, Luebeck, Germany
3. Department of Psychology, University of Waterloo, Waterloo, Ontario, Canada
4. School of Medicine, University of Washington, Seattle
5. Renaissance School of Medicine, Stony Brook University, Stony Brook, New York
6. Centre of Excellence in Responsible Gaming, University of Gibraltar, Gibraltar
7. Institute of Psychology, Eötvös Loránd University, Budapest, Hungary