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Katsuhiko Tetsuka
Department of Neuro-otology, Tokyo Metropolitan Neurological Hospital
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Niro Tayama
Department of Otorhinolaryngology, Tokyo University Branch Hospital
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Ryuzaburo Higo
Department of Otorhinolaryngolory, Tokyo University Hospital
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Seiji Niimi
Department of Speech Physiology, Graduate School of Medicine, The University of Tokyo