1. Department of Neuropsychiatry, Keio University School of Medicine, Tokyo, Japan.
2. Department of Radiological Sciences, Graduate School of Health Sciences, Tokyo Metropolitan University, Tokyo, Japan.
3. Office of Radiation Technology, Keio University Hospital, Tokyo, Japan.
4. Medical Institute of Developmental Disabilities Research, Showa University, Tokyo, Japan.
5. Department of Psychiatry and Cognitive-Behavioral Medicine, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan.