1. Department of Neuropsychiatry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences; Okayama Japan
2. Department of Psychiatry; Kinoko Espoir Hospital; Okayama Japan
3. Department of Laboratory Medicine and Pathology; Zikei Institute of Psychiatry; Okayama Japan
4. Dementia Research Project; Tokyo Metropolitan Institute of Medical Science; Tokyo Japan
5. Department of Psychiatry; Kawasaki Medical School; Okayama Japan