1 Department of Psychiatry and Mental Health, SA Medical Research Council Unit on Risk and Resilience in Mental Disorders, University of Cape Town, Cape Town, South Africa.
2 Institute for Health and Behaviour, University of Luxembourg, Luxembourg.
3 Division of Brain Science, Imperial College London, London, UK.
4 Department of Psychiatry and Behavioral Neuroscience, University of Chicago, Chicago, IL, USA.
5 University of Hertfordshire, Hatfield, and School of Clinical Medicine, Cambridge University, Cambridge, UK.
6 National Center for Addiction Services Administration, Yokosuka, Kanagawa, Japan.
7 Mental Health Institute, Central South University, Changsha, China.
8 Central Institute of Mental Health, Mannheim, Germany.
9 Department of Neuropsychiatry, Hyogo College of Medicine, Nishinomiya, Japan.
10 Yale University School of Medicine, and Connecticut Council on Problem Gaming, Clinton, CT, USA.
11 Clinic for Psychiatry and Psychotherapy, University of Lübeck, Lübeck, Germany.
12 Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK.
13 Department of Psychiatry, Swami Rama Himalayan University, Dehradun, India.
14 Disciplines of Psychiatry and Addiction Medicine, University of Sydney, Sydney, NSW, Australia.
15 Department of Mental Health and Substance Abuse, World Health Organization, Geneva, Switzerland.