1. Department of Psychology, Iowa State University, Ames, Iowa;
2. Department of Psychology, Ohio Wesleyan University, Delaware, Ohio;
3. Department of Psychology and Education Science, University of Geneva, Geneva, Switzerland;
4. Department of Brain and Cognitive Science, University of Rochester, Rochester, New York;
5. Department of Psychology, University of Toledo, Toledo, Ohio;
6. reSTART Life, LLC, Fall City, Washington;
7. School of Family Life, Brigham Young University, Provo, Utah;
8. Department of Mental Health, Naval Medical Center San Diego, San Diego, California;
9. Of One Mind, Los Angeles, California;
10. Department of Psychology, University of Wisconsin-Madison, Madison, Wisconsin;
11. International Gaming Research Unit, Psychology Division, Nottingham Trent University, Nottingham, United Kingdom;
12. Collegiate Coaching, Boulder, Colorado;
13. Calhoun Cardiology Center, School of Medicine, University of Connecticut, Farmington, Connecticut;
14. Department of Psychology and Behavioural Sciences, Coventry University, Coventry, United Kingdom;
15. Criminological Research Institute of Lower Saxony, Hanover, Germany;
16. Center on Media and Child Health, Harvard University Medical School, Harvard University, Cambridge, Massachusetts;
17. InReach, Boulder, Colorado;
18. Online Gamers Anonymous, Osceola, Wisconsin; and
19. Stategic Leadership, St Bonaventure University, St Bonaventure, New York