1. Faculty of Education, Hokkaido University, Sapporo, Japan
2. Department of Child Psychiatry, Musashino Child Development Clinic, Tokyo, Japan
3. Department of Neuropsychiatry, Fukushima Medical University, Fukushima, Japan
4. Department of Child and Adolescent Psychiatry, Arisawabashi Hospital, Toyama, Japan
5. Department of Psychiatry, Aizu Medical Center, Fukushima Medical University, Fukushima, Japan