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*kosuke Ishikawa
Department of Dentistry for Children and Disabled Person, Division of Oral Functional Science,
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Tsukasa Akasaka
Department of Biomedical, Dental Materials and Engineering, Graduate School of Dental Medicine, Hokkaido University,
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Yasutaka Yawaka
Department of Dentistry for Children and Disabled Person, Division of Oral Functional Science,
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Fumio Watari
Department of Biomedical, Dental Materials and Engineering, Graduate School of Dental Medicine, Hokkaido University,