1. Departments of Psychology and
2. NTNU Social Science, Trondheim, Norway;
3. Department of Child and Adolescent Psychiatry, St Olav's Hospital, Trondheim, Norway;
4. Department of Psychology, University of California, Davis, Davis, California; and
5. Department of Special Education, King Abdulaziz University, Jeddah, Saudi Arabia;
6. Faculty of Medicine, Norwegian University of Science and Technology, Trondheim, Norway;
7. Department of Child Psychiatry, Turku University, Turku, Finland