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Tetsuo Himi
Department of Otolaryngology, Sapporo Medical University
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Ken-ichi Takano
Department of Otolaryngology, Sapporo Medical University
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Ryuta Kamekura
Department of Otolaryngology, Sapporo Medical University
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Chieko Tsubomatsu
Department of Otolaryngology, Sapporo Medical University
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Ayumi Abe
Department of Otolaryngology, Sapporo Medical University
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Keiji Yamashita
Department of Otolaryngology, Sapporo Medical University