1. Rehabilitation Clinic for Speech and Swallowing Disorders; The Nippon Dental University School of Life Dentistry; Tokyo Japan
2. Department of Clinical Neuroscience Oral and Maxillofacial Functional Rehabilitation; University of the Ryukyus; Nishihara Japan
3. Department of Communicative Disorders; University of Redlands; Redlands California USA
4. Division of Oral Rehabilitation; The Nippon Dental University Graduate School of Life Dentistry; Tokyo Japan