1. Center for Community-based Healthcare Research and Education, Shimane University, Izumo, Japan
2. Department of Medical Device Development, mediVR, Inc., Osaka, Japan
3. Division of Environmental Medicine and Population Sciences, Department of Social and Environmental Medicine, Osaka University Graduate School of Medicine, Suita, Japan
4. Division of Stroke Rehabilitation, National Cerebral and Cardiovascular Center Hospital, Suita, Japan