1. Department of Gerodontology and Oral Rehabilitation Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU) Bunkyo‐ku Japan
2. Division of Oral Function Management, Department of Oral Health Management Showa University School of Dentistry Ota‐ku Japan
3. Department of Dysphagia Rehabilitation Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU) Bunkyo‐ku Japan
4. Department of Oral Health Sciences for Community Welfare Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU) Bunkyo‐ku Japan
5. Clinical Department of Dentistry Japan Community Health‐care Organization Tokyo Shinjuku Medical Center Shinzyuku‐ku Japan
6. Department of Nutrition Service Tokyo Medical and Dental University Hospital Bunkyo‐ku Japan
7. Medical Education Research and Development Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU) Bunkyo‐ku Japan