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Ichiro Fukunaga
Treatment and Welfare Center, Kochi Prefectural Government, Kochi, Japan Aki Public Health and Welfare Office, Kochi Prefectural Government, Kochi, Japan
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Taisuke Kobayashi
Department of Otolaryngology, Head and Neck Surgery, Kochi Medical School, Kochi, Japan
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Kahori Hirose
Department of Otolaryngology, Head and Neck Surgery, Kochi Medical School, Kochi, Japan