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Atsushi Sakakura
Department of Otolaryngology, Osaka Medical College
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Asako Tanaka
Department of Otolaryngology, Osaka Medical College
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Koutetsu Lee
Department of Otolaryngology, Osaka Medical College
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Tamio Kitahara
Department of Otolaryngology, Osaka Medical College
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Masahiro Nakamura
Department of Otolaryngology, Osaka Medical College
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Ryuzaburo Nonaka
Department of Otolaryngology, Osaka Medical College
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Ibuki Hayashi
Department of Otolaryngology, Osaka Medical College
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Kazuo Makimoto
Department of Otolaryngology, Osaka Medical College
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Hiroshi Takenaka
Department of Otolaryngology, Osaka Medical College
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Ryuuichi Kanai
Department of Otolaryngology, Osaka Saiseikai Nakatsu Hospital
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Natsuko Araki
Department of Pediatrics, Osaka Medical College
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Ken Nakai
Department of Otolaryngology, Osaka Saiseikai Nakatsu Hospital
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Toru Ogiwara
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Author's Organization:Department of Otolaryngology, Osaka Saiseikai Ibaraki Hospital