1. Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
2. Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, Kobe, Japan
3. Department of Rehabilitation Science, Osaka Health Science University, Osaka, Japan
4. Department of General and Geriatric Medicine, Kawasaki Medical School, Okayama, Japan
5. Osaka Rosai Hospital, Osaka, Japan