1. Department of Rehabilitation, Tsuchiura Kyodo General Hospital: 11-7 Manabeshinmachi, Tsuchiura City, Ibaraki 300-0053, Japan
2. Department of Physical Therapy, Faculty of Health Science, Ibaraki Prefectural University of Health Sciences, Japan
3. Department of Endocrinology and Metabolism, Tsuchiura Kyodo General Hospital, Japan