1. Tokiwa Child Development Center, Tokiwa Hospital, Sapporo, Japan.
2. Department of Neuropsychiatry, Sapporo Medical University, School of Medicine, Sapporo, Japan.
3. Department of Psychiatry, Shiga Prefectural Mental Medical Center, Shiga, Japan.
4. Department of Psychiatry, Shiga University of Medical Science, Shiga, Japan.
5. Department of Child and Adolescent Psychiatry, Graduate School of Medicine, Hokkaido University, Sapporo, Japan.
6. Department of Psychiatry, Child and Adolescent Psychiatry Division, University of Hawai'i John A. Burns School of Medicine, Honolulu, HI, USA.
7. Centre for Child and Adolescent Mental Health and Child Protection Faculty of Medicine, Trondheim, Norway.