1. Department of Child and Adolescent Psychiatry, Skåne University Hospital, 22185 Lund, Sweden
2. Department of Clinical Sciences Lund, Faculty of Medicine, Lund University, 22100 Lund, Sweden
3. Department of Psychology, Stockholm University, 11418 Stockholm, Sweden
4. Department of Behavioral Studies, University West, 46132 Trollhättan, Sweden
5. Malmö Addiction Center, Skåne University Hospital, 20502 Malmö, Sweden
6. School of Behavioural, Social and Legal Sciences, Örebro University, 70182 Örebro, Sweden