1. Department of Rehabilitation, Niigata Rinko Hospital, Japan
2. Division of Clinical Nephrology and Rheumatology, Niigata University Graduate School of Medical and Dental Sciences: 1-757 Asahimachi-dori, Niigata, Niigata 951-8510, Japan
3. Internal Medicine, Niigata Rinko Hospital, Japan
4. Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Japan
5. Department of Physical Therapy, School of Health Science, Fukushima Medical University, Japan