1. Department of Community Health Sciences; Graduate School of Health Sciences; Kobe University; Hyogo Japan
2. Department of Physical Therapy; School of Health Sciences at Narita; International University of Health and Welfare; Chiba Japan
3. National Center for Geriatrics and Gerontology; The Center for Comprehensive Care and Research on Memory Disorders; Obu Aichi Japan
4. National Center for Geriatrics and Gerontology; Medical Genome Center; Obu Aichi Japan
5. Kobe City Hospital Organization; Kobe City Medical Center, West Hospital; Hyogo Japan