1. National Institute of Floricultural Science, National Agriculture and Food Research Organization, Tsukuba
2. Department of Neurology, Showa University School of Medicine, Tokyo
3. Tokyo College of Welfare, Tokyo
4. Department of Occupational Therapy, Ibaraki Prefectural University of Health Sciences, Ami
5. Center for Medical Sciences, Ibaraki Prefectural University of Health Sciences, Ami
6. Institute of Psychology, University of Tsukuba, Tsukuba
7. Department of Rehabilitation Medicine, Ibaraki Prefectural University of Health Sciences Hospital, Ami, Japan