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*Ei Hashino
Department of Preventive Dentistry, Graduate School of Dentistry, Osaka University
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Masae Kuboniwa
Department of Preventive Dentistry, Graduate School of Dentistry, Osaka University
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Yumiko Yamamoto
Department of Preventive Dentistry, Graduate School of Dentistry, Osaka University
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Kazuhiro Suematsu
Mitsubishi-Kagaku Foods Corporation
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Hiroshi Cho
Mitsubishi-Kagaku Foods Corporation
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Satoshi Shizukuishi
Department of Preventive Dentistry, Graduate School of Dentistry, Osaka University