1. Psycho-Developmental Clinic, Sapporo Medical University Hospital, Sapporo, Japan.
2. Department of Neuropsychiatry, Sapporo Medical University, School of Medicine, Sapporo, Japan.
3. Department of Psychiatry, Tohoku University, Graduate School of Medicine, Sendai, Japan.
4. Kanagawa Psychiatric Center, Serigaya Hospital, Yokohama, Japan.
5. Psychiatry, Izumihara Hospital, Shunan, Japan.
6. Department of Psychiatry, School of Medicine, Fukuoka University, Fukuoka, Japan.