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Kazufumi Obata
Department of Otolaryngology, Sapporo, Medical University
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Ryo Miyata
Department of Otolaryngology, Sapporo, Medical University
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Makoto Kurose
Department of Otolaryngology, Sapporo, Medical University
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Atsushi Kondo
Department of Otolaryngology, Sapporo, Medical University
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Kenichi Takano
Department of Otolaryngology, Sapporo, Medical University