1. Department of Medical Psychology, Nippon Medical School, Tokyo, Japan
2. Division of Psychiatry, University College London, London, UK
3. Department of Medical Psychology, Nippon Medical School, Tokyo, Japan; Dementia Centre, Nippon Medical School Musashi Kosugi Hospital, Kawasaki, Japan
4. Department of Neurology, Nippon Medical School, Tokyo, Japan
5. Department of Psychiatry, Nippon Medical School, Tokyo, Japan
6. Research Team for Social Participation and Community Health, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
7. Department of Clinical Psychology, Graduate School of Education, Naruto University of Education, Tokushima, Japan
8. Department of Psycho-Social Studies, School of Arts and Letters, Meiji University, Tokyo, Japan
9. Dementia Centre, Nippon Medical SchoolMusashi Kosugi Hospital, Kawasaki, Japan
10. Division of Psychiatry, University College London, London, UK; Camden and Islington NHS Foundation Trust, London, UK