1. Department of Addictive Behavior and Addiction Medicine; Central Institute of Mental Health, Medical Faculty Mannheim/Heidelberg University; Mannheim Germany
2. National Hospital Organization Kurihama Medical and Addiction Center; Yokosuka Kanagawa Japan
3. Departments of Psychiatry; Neurobiology and Child Study Center and CASAColumbia, Yale University School of Medicine; New Haven CT USA
4. Centre for Youth Substance Abuse Research, University of Queensland, Brisbane, Australia; Disciplines of Psychiatry and Addiction Medicine, Faculty of Medicine, University of Sydney; Sidney Australia