1. Health and Welfare Research Institute, Kibi International University, Okayama, Japan
2. Zikei Hospital, Okayama, Japan
3. Department of Occupational Therapy, School of Health Sciences, Kibi International University, Okayama, Japan
4. Kawaguchi Clinic, Okayama, Japan
5. Kurashiki Neurology Hospital, Okayama, Japan
6. Mannari Hospital, Okayama, Japan