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Akinobu Kudo
Department of Orthodontics, Hokkaido University School of Dentistry.
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Toru Imai
Department of Orthodontics, Hokkaido University School of Dentistry.
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Akio Yoshida
Department of Orthodontics, Hokkaido University School of Dentistry.
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Masahiko Sakuraya
Department of Orthodontics, Hokkaido University School of Dentistry.
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Masaru Murakami
Department of Orthodontics, Hokkaido University School of Dentistry.