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Nobuhiro HANADA
Department of Preventive Dentistry, Kyushu Dental College
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Yoshihisa YAMASHITA
Department of Preventive Dentistry, Kyushu Dental College
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Yukie SHIBATA
Department of Preventive Dentistry, Kyushu Dental College
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Tadamichi TAKEHARA
Department of Preventive Dentistry, Kyushu Dental College