1. Department of Education, Uppsala University, Uppsala, Sweden
2. Department of Public Health Sciences, Karolinska Institute, Stockholm, Sweden
3. Centre for Epidemiology and Community Health, Stockholm Region, Sweden
4. Telethon Kids Institute, The University of Western Australia, Nedlands, WA, Australia
5. Department of Psychology, Stockholm University, Stockholm, Sweden
6. Department of Psychology, University of Nevada, Las Vegas, NV, USA