1. Division of Gerodontology and Oral Rehabilitation Graduate School of Medical and Dental Sciences Tokyo Medical and Dental University Tokyo Japan
2. Department of Health Sciences Major of Oral Health Sciences Saitama Prefectural University Koshigaya‐shi Japan
3. Cosmo21 Dental Clinic Toyama Japan
4. Laboratory of Clinical Nutrition Management Faculty of Nutrition Kagawa Nutrition University Sakado‐shi Japan
5. Division of Gerodontology Department of Oral Health Science Faculty of Dental Medicine Hokkaido University Sapporo Japan