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Tetsuo ISHII
Department of Otolaryngology, Teikyo University School of Medicine, Tokyo, Japan
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Masao NAGARA
Department of Otorhinolaryngology, Niigata University School of Medicine, Niigata, Japan
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Kanesato MIZUKOSHI
Department of Otorhinolaryngology, Niigata University School of Medicine, Niigata, Japan