1. Laboratory of Addiction Policy, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Republic of Korea.
2. Department of Psychology, Chonnam National University, Gwangju, Republic of Korea.
3. Department of Psychiatry, SMG-SNU Boramae Medical Center, Seoul, Republic of Korea.
4. Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.
5. Institute of Psychology, Eötvös Loránd University, Budapest, Hungary.
6. Nottingham Trent University, Psychology Division, Nottingham, United Kingdom.
7. Eulji Addiction Institute, Gangnam Eulji Hospital, Eulji University, Seoul, Republic of Korea.
8. Chungmugong Leadership Center, Naval Education and Training Command, Republic of Korea Navy, Changwon, Republic of Korea.
9. Korea Institute on Behavioral Addictions, Easy Brain Clinic, Seoul, Republic of Korea.
10. Health Care & Information Research Institute, Namseoul University, Cheonan, Republic of Korea.