1. Department of Otolaryngology-Head and Neck Surgery; Kyoto Prefectural University of Medicine; Kyoto Japan
2. Department of Speech and Hearing Sciences; International University of Health and Welfare, and the Voice and Swallowing Center, Fukuoka Sanno Hospital; Fukuoka Japan
3. Department of Physiology; Hyogo College of Medicine; Hyogo Japan
4. Florey Institute of Neuroscience and Mental Health; University of Melbourne; Melbourne Victoria Australia