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K. Yamanoto
Research Institute of Applied Electricity, Hokkaido University
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A. Toshimitsu
Research Institute of Applied Electricity, Hokkaido University
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T. Mikami
Research Institute of Applied Electricity, Hokkaido University
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S. Hayashi
School of Dentistry, Hokkaido University
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R. Harada
School of Dentistry, Hokkaido University
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S. Nakamura
School of Dentistry, Hokkaido University