1. Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, Suita, Osaka 565-0871, Japan
2. Department of Prosthodontics, Gerodontology and Oral Rehabilitation, Osaka University Graduate School of Dentistry, Suita, Osaka 565-0871, Japan
3. Department of Clinical Thanatology and Geriatric Behavioral Science, Osaka University Graduate School of Human Sciences, Suita, Osaka 565-0871, Japan
4. Department of Cardiovascular Medicine and Hypertension, Graduate School of Medical and Dental Science, Kagoshima University, Kagoshima, Kagoshima 890-8544, Japan
5. Division of Health Sciences, Osaka University Graduate School of Medicine, Suita, Osaka 565-0871, Japan