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.