1. Department of Neuropsychiatry Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences Okayama Japan
2. Department of Pediatric Radiology Okayama University Hospital Okayama Japan
3. Center for Comprehensive Care and Research on Memory Disorders National Center for Geriatrics and Gerontology Obu Japan
4. Department of Psychiatry National Hospital for Geriatric Medicine Obu Japan