1. Graduate School of Environment and Information Sciences, Yokohama National University, Yokohama, Japan
2. Department of Rehabilitation, Kansai Medical University, Hirakata, Japan
3. Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Japan
4. Department of Assistive Technology, Research Institute of National Rehabilitation Center for Persons with Disabilities, Tokorozawa, Japan
5. Center for Developmental Disabilities of Yokosuka, Yokosuka, Japan