1. , Niigata University Graduate School of Medical and Dental Science, , Japan
2. , Niigata Rehabilitation Hospital, , Japan
3. Niigata Institute for Health and Sports Medicine, , Japan
4. , Niigata University of Health and Welfare, , Japan
5. , Niigata University Graduate School of Medical and Dental Sciences, , Japan
6. , Nioji Onsen Hospital, , Japan