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*Naoki Kakudate
Department of Periodontology and Endodontology, Division of Oral Health Science,Hokkaido University Graduate School of Dental Medicine Nagayama Family Dental Clinic
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Manabu Morita
Department of Preventive Dentistry, Division of Oral Health Science,Hokkaido University Graduate School of Dental Medicine
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Masako Fujisawa
Department of Preventive Dentistry, Division of Oral Health Science,Hokkaido University Graduate School of Dental Medicine
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Masato Nagayama
Nagayama Family Dental Clinic
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Masamitsu Kawanami
Department of Periodontology and Endodontology, Division of Oral Health Science,Hokkaido University Graduate School of Dental Medicine