1. Department of Rehabilitation Medicine; Hamamatsu City Rehabilitation Hospital; Hamamatsu Japan
2. Department of Speech and Hearing Sciences; International University of Health and Welfare; Narita Japan
3. National Center for Geriatrics and Gerontology; Obu Japan
4. Department of Otolaryngology; Kochi Medical School; Kochi Japan
5. Department of Rehabilitation Medicine I, School of Medicine; Fujita Health University; Toyoake Japan
6. Palliative Care Center; Aichi Medical University; Nagakute Japan
7. Department of Oral and Maxillofacial Surgery; Southern Tohoku General Hospital; Koriyama Japan
8. Department of Clinical Nutrition and Food Services; Nagasaki Rehabilitation Hospital; Nagasaki Japan
9. Department of Rehabilitation; Japanese Red Cross Society Suwa Hospital; Suwa Japan
10. Department of Geriatric Medicine, Graduate School of Medicine; The University of Tokyo; Tokyo Japan
11. Department of Dysphagia Rehabilitation; Nihon University School of Dentistry; Tokyo Japan
12. Department of Speech and Hearing Sciences; International University of Health and Welfare, and the Voice and Swallowing Center, Fukuoka Sanno Hospital; Fukuoka Japan
13. Department of Rehabilitation Medicine; Yokohama City University Medical Center; Yokohama Japan
14. Department of General Medicine; Kyoto Prefectural University of Medicine; Kyoto Japan
15. Department of Rehabilitation Medicine; Kumamoto Rehabilitation Hospital; Kumamoto Japan