1. Mental Health and Nursing Research Team, Tokyo Metropolitan Institute of Medical Science, Setagaya-ku, Tokyo, Japan
2. Department of Economics, Rutgers University, the State University of New Jersey, Camden, NJ, USA
3. Division of Research, Tokyo Dementia Care Research and Training Center, Suginami-ku, Tokyo, Japan
4. Research Project for Mental Health Promotion, Tokyo Metropolitan Institute of Medical Science, Setagaya-ku, Tokyo, Japan