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*Koushu Fujinami
Department of Clinical Oral Health Science, Tokyo Dental College
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Mikio Ota
Department of Periodontology, Tokyo Dental College
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Atsushi Saito
Department of Clinical Oral Health Science, Tokyo Dental College
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Masatake Tsunoda
Department of General Dentistry, Tokyo Dental College
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Satoru Yamada
Department of Periodontology, Tokyo Dental College