1. Department of Geriatric and General Medicine Osaka University Graduate School of Medicine Suita Osaka Japan
2. Department of Anatomy, Biochemistry and Physiology, John A. Burns School of Medicine, Institute for Biogenesis Research University of Hawaii Honolulu HI USA
3. Department of General and Geriatric Medicine Kawasaki Medical University Okayama Japan
4. Department of Rehabilitation Science Graduate School of Health Sciences Kobe University Kobe Hyogo Japan
5. Department of Rehabilitation Science Osaka Health Science University Osaka Japan