| Affiliation: | 1. Department of Special Needs Dentistry, Division of Hygiene and Oral Health, Showa University School of Dentistry, Tokyo, Japan;2. Department of Critical Care Medicine and Dentistry, Division of Medically Compromised Geriatric Dentistry Graduate School of Dentistry, Kanagawa Dental University, Yokosuka, Japan;3. Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan;4. National Center for Geriatrics and Gerontology, Aichi, Japan;5. Department of Oral Health Care Education, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, Tokyo, Japan;6. Department of Oral and Maxillofacial Surgery, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan |
