1. Department of Occupational Therapy, Medical Corporation Nasukougen Hospital, Nasu-machi, Japan
2. Division of Occupational Therapy, Doctoral Program in Health Sciences, Graduate School of Health and Welfare Sciences, Ohtawara, Japan
3. Graduate School of Health and Welfare Sciences, International University of Health and Welfare, Chiba, Japan
4. Retired, Graduate School of Health and Welfare Sciences, International University of Health and Welfare, Tokyo, Japan