Affiliation: | 1. Department of Prosthodontics, Gerodontology and Oral Rehabilitation, Graduate School of Dentistry, Osaka University, Osaka, Japan;2. Division of Dysphagia Rehabilitation, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan;3. Clinic for Masticatory Disorders, Removable Prosthodontics and Special Care Dentistry, Center for Oral Medicine, Dental and Maxillo‐Facial Surgery, University of Zurich, Zurich, Switzerland |