1. Department of Neuropsychiatry; Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences; Okayama Japan
2. Clinical Research Institute; National Hospital Organization Minami-Okayama Medical Center; Hayashima Japan
3. Department of Psychiatry; Kinoko Espoir Hospital; Kasaoka Japan
4. Department of Laboratory Medicine and Pathology; Zikei Institute of Psychiatry; Okayama Japan
5. Kurashiki Neurological Hospital; Kurashiki Japan
6. Department of Psychiatry; Sanyo Hospital; Okayama Japan
7. Dementia Research Project; Tokyo Metropolitan Institute of Medical Science; Tokyo Japan