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*Hiroki Sugito
Division of General Dentistry, Tokyo Dental College Chiba Hospital
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Sachiyo Tomita
Department of Periodontology, Tokyo Dental College
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Junichi Takahashi
NTV Shiodome Dental Clinic
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Satoru Yamada
Department of Periodontology, Tokyo Dental College
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Masatake Tsunoda
Division of General Dentistry, Tokyo Dental College Chiba Hospital