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Yasuo HIRAYAMA
Department of Preventive Dentistry and Public Health, Faculty of Dentistry, Tokyo Medical and Dental University
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Fumiko OZAKI
Department of Preventive Dentistry and Public Health, Faculty of Dentistry, Tokyo Medical and Dental University
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Mitsuo KISHI
Department of Preventive Dentistry and Public Health, Faculty of Dentistry, Tokyo Medical and Dental University
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Shogoro OKADA
Department of Preventive Dentistry and Public Health, Faculty of Dentistry, Tokyo Medical and Dental University