1. Departments of General Internal Medicine Iizuka Hospital Fukuoka Japan
2. Department of Clinical Epidemiology, Kochi Medical School Kochi University Nankoku Japan
3. Department of Rehabilitation, Faculty of Wakayama Health Care Sciences Takarazuka University of Medical and Health Care Wakayama Japan
4. The Academic and Research Centre Hokkaido Centre for Family Medicine Sapporo Japan
5. Department of Occupational Therapy Kanagawa University of Human Services Yokosuka Japan
6. Department of Healthcare Epidemiology, School of Public Health in the Graduate School of Medicine Kyoto University Kyoto Japan
7. Department of Preventive Medicine and Public Health Keio University School of Medicine Tokyo Japan