1. Osaka University Graduate School of Dentistry; Osaka Japan
2. Osaka University Graduate School of Human Sciences; Osaka Japan
3. Tokyo Metropolitan Geriatric Hospital and Institute of Gerontology; Tokyo Japan
4. University of Zurich; Zurich Switzerland
5. Osaka University Graduate School of Medicine; Osaka Japan
6. Center for Supercentenarian Medical Research; Keio University School of Medicine; Tokyo Japan